Why Doesn’t 2015 Look As It Was Depicted in Back to the Future II?

This year marks the 30^th anniversary of the Back to the Future franchise. It’s a very important anniversary. Why? Because, as Doc Brown says “it seems like a nice, round number,” and it is the period of time that the protagonists leap over from their base time of 1985, either into the past, or the future (give or take 100 years for Back to the Future III).

Yes, fanboys and friends, we have arrived at the future, 2015, and have the benefit of being able to compare our current lives with what was predicted by Robert Zemeckis. Zemeckis claims, by the way, that he had no intention of trying to accurately predict what life would be like 30 years in the future, he was just trying to be funny. But Zemeckis doesn’t need to backpedal. Yes, we have no flying cars, hoverboards (well, just barely), mass produced sneakers that tie themselves, double-knotted neckties, popular clothing in holographic colors, or 18 Jaws sequels, but there is a good reason for this.

Marty McFly Changes the Future

As we see in Back to the Future II when Biff escapes into the past with the Sports Almanac, changing events in the past can massively affect the present (and the future). Biff goes from being a sap to kingpin and back again due to the characters’ various mucking about in past events. What we conveniently forget when Back to the Future II opens is that a massive change to the past has already happened.

George McFly: World Maker

If you’ll recall, in Back to the Future, Marty helps his dad learn to stand up to Biff, and as a result, George becomes a cool, successful guy rather than the milquetoast he was before. Given the McFly family’s psychotic reaction to being called “chicken,” one might have thought that Marty would have exploited this weakness to make a man out of George in 1955 and saved himself a lot of time and trouble, but perhaps this weakness skipped a generation, or Marty simply isn’t that bright and hadn’t thought of it.*

However, what we do not realize is that Marty’s changes extended far beyond making his family a success. As a result of Marty’s actions, George McFly becomes a (presumably successful) science fiction author. Now we all know that science fiction authors often provide the ideas and framework for what later becomes science fact. Star Trek gave us the model for cell phones. Isaac Asimov conceived of the e-Reader and much of the way we think about robots. I submit that the future technology that we see in Back to the Future II’s 2015 that we do not have today come as a direct result of ideas from George McFly’s novels.

 Why Fax machines instead of the internet? Perhaps one of McFly’s adventures glorified this now-archaic device, encouraging scientists to put their efforts into perfecting it rather than other, less reliable-seeming types of wireless technology. Why were there 18 Jaws sequels? (A better question, why weren’t there 18 Jaws sequels?) Did you catch that latest George McFly best seller about the man-eating shark from space? How did the Cubs win the World Series? Well, that one I can’t explain, but you get the idea.

Back to the Present

The conclusion is inescapable. Before Marty McFly went back to 1955 to escape the Libyan terrorists, his 2015 looked exactly as ours does today, with the internet, cars and skateboards that stay rooted firmly to the ground, and a hapless Cubs franchise that will never get it quite right. By going back in time and affecting the timeline, he created the awesome 2015 that we in this world will never get to enjoy.

*And sorry, fans, but Marty McFly is not particularly intelligent. Observe how many times in the first Back to the Future he makes comments that suggest he does not realize that he is in the past although it should be abundantly clear at this point that this is what has happened. Also, Marty acts surprised when Doc Brown suggests his mother is romantically interested in him despite the fact that she has already overtly hit on him. In addition, he’s not creative enough to think of any fake names for himself that don’t already belong to existing famous people, and even at middle age he is able to be manipulated psychologically with tactics typically used on children.

Wormholes, Worldlines and Whatnot

In the first blog in this series, I talked about the many reasons that I felt time travel stories don’t work. I specifically mentioned the main physical, metaphysical, logical and aesthetic objections. In the second blog, I bravely took up the other side, and discussed how the Many Worlds Theory effectively rebuts the metaphysical objections, and to some extent, the logical ones. However, the physical, aesthetic, and to some extent, the logical objections remain. What’s a time travel advocate to bring up in his defense now? Answer: Wormholes.

Wormholes

A wormhole functions according the idea that spacetime is curved, and there can essentially be a situation where a bridge is created cutting right through that curve, a sort of tunnel between an earlier and later time. In other words, if time were a straight line ----, it would take you a certain amount of time to get from point A to point B. But if time were more of a “C” shape, you could get from one end of the C to the other much faster by cutting through it rather than going around the curve.

This indeed solves a lot of problems. It counters the physical objection, because you can have a wormhole where objects are not moving at the speed of light inside the tunnel, although they might appear to be to outside observers (a wormhole is not simply two black holes with a bridge between them, but rather a black hole and a white hole linked by negative energy).

The show Sliders made heavy use of wormholes and the Einstein-Rosen bridges between them. Wormholes also take care of my main logical objection, the Tourist Trap, which was that if time travel is possible at one point, it becomes possible simultaneously throughout the time stream. Scientists have postulated that time travel through a wormhole would require the “stationary end” to appear first. In other words, a wormhole couldn’t open up allowing you to travel back to someplace where there wasn’t a wormhole before. The point of this being that we may not have experienced time travel yet because the first “stop,” or the first wormhole, hasn’t been created/found yet.

Worldlines

There has been another use of time travel in fiction that I haven’t mentioned yet, but that I have found to be very effective. This is the idea of the worldline. Worldlines are essentially lines that travel through space and time at once, as opposed to a timeline that simply marks the passage of time. In other words, a person’s life, drawn on a graph, would be a worldline, as it plots their movement through space and time. Some time travel stories intimate that it is possible to travel back and forth on your own worldline, since it is simply a line that exists in the universe, not something that is being created or destroyed. Under the right circumstances you should able to walk back and forth along it like the path to your tomato garden.

Whatnot
This still does not address my aesthetic objection, which you’ll remember was that time travel stories are simply messy: Specifically, it 1. disrupts continuity and makes it difficult to invest in the characters, and 2. creates the slippery slope: You go back and change something, I go back and fix it, you go back and unfix it, ad infinitum. To close out this extended rant, I’d like to take a look at how some time travel stories handle all this and how effective I think it has been.

Star Trek

I frankly think that time travel has made Star Trek a pretty big mess. You can argue with the last movie that the Romulan time trip created a new, alternate timeline, and that the initial timeline is moving forth as it always had (albeit without a Spock). That’s okay, I guess, but I suspect we will never see our “real” timeline again, and even that timeline has been removed by so many jumps it hardly matters (for example in Star Trek, First Contact, the Borg go back in time and take over Earth, radically changing its history. The Enterprise crew goes back and fixes it. However according to the Many Worlds theory, the initial timeline was unchanged by the Borg, and the Borg’s new timeline was unchanged by the Enterprise; we simply have three different universes in effect. Yes I have a headache now too).

Quantum Leap, Watchmen, Slaughterhouse Five

I lump these together because they all make what I think is effective use of the “Worldline” theory of time travel. Dr. Sam Beckett can only travel back and forth through time within his own lifetime, while Dr. Manhattan experiences different times in his life simultaneously. Billy Pilgrim has come “unstuck” in time, and experiences his life randomly through time, jumping from one point to the next without rhyme or reason (or at least without rhyme). In each case, the universe is not offended by their time travel.

Back to the Future

Back to the Future alludes to the Many Worlds theory, but not quite effectively. Dr. Brown does explain how moving through time creates an alternate timeline. However, he creates a sticky situation when he does a test run by sending his dog three minutes into the future. The dog has clearly reappeared in the same timeline, which forces us to confront the possibility that somehow moving ahead in time does not create new timelines while moving backwards does. Marty also finds that changing the past is affecting his original present (the picture with his siblings disappearing as they are “uncreated”), which gives rise to the “grandfather paradox” anew.

Sliders

Sliders handles the wormhole idea pretty well, but its protagonists are jumping through dimensions, not moving through time and space. There are no paradoxes because they never encounter the same timeline twice, although Quinn Mallory’s quest to return to his home dimension may prove impossible.

Comic Books

Members of the Legion of Superheroes travel freely back and forth through time with little concern about the consequences. The mainstream DC universe has not created a very sophisticated look at time travel although they used to have an interesting conceit where if you went back to a time where you already existed, you would appear as a wraith, since the same person cannot “be in two places at once.”

The Terminator

Terminator time travel isn’t too unwieldy for a number of reasons. The first is that only a handful of people go back before the time travel device is destroyed, and they can’t travel the other way. There are still some paradox issues, but since time travel is used so sparingly, it doesn’t interfere with the story too much.

Okay. I’m finally done with the time travel stuff. Next week I’ll go back to ranting about traffic patterns in L.A. or bad poker beats or why some Right to Lifers are psychotic or whatever.

Why You Love Time Travel Part I

In my last post, I complained about time travel as it appears in television, movies and fiction in general. I felt that there were a number of inconsistencies about time travel as to make it so implausible as to render any story based on it completely unenjoyable.

Clearly I’m in the minority in this opinion. Time travel stories continue to delight, generation after generation. Why should this be, if my objections are so irrefutable? Well, one reason is some people just like a good story and don’t care how unbelievable it is. As I pointed out in my last blog, Superman’s “impossible” ability to fly doesn’t deter my enjoyment of his adventures (although I prefer Batman). However, there's more to it than that.

The Objections to Time Travel

I raised four basic objections to time travel as portrayed in fiction: Physical: As one approaches the speed of light, required for going back in time, mass becomes infinite, effectively destroying the time traveler; Metaphysical: Specifically the Grandfather Paradox (you go back in time and kill your grandfather, therefore you are never born and cannot go back in time to kill your grandfather, etc.) and the Ontological Paradox (Future Craig hands me an envelope which he tells me to hold on to for five years. Five years later I go back in time and hand myself the envelope. Where did the envelope come from?). Logical: Specifically, the Tourist Objection; If time travel is possible, how come we don’t know about it yet? We should be being visited by an effectively infinite number of time travelers all the time, where are they? And Aesthetic: How can any story have internal consistency if someone can always go back in time and change what happened?

I mentioned that there are rebuttals to all of these objections (I excepted the aesthetic but I will stipulate that for most people, if the other objections are satisfied the aesthetic one should be as well, even if I personally am not comfortable with it), and hence, some time travel stories that work. So here goes:

Let’s start by addressing the Metaphysical objections. The famous grandfather paradox and the ontological paradox. There are two main ways that philosophers approach the problem of time travel paradoxes: The Many Worlds Theory and the Novikov Self-Consistency Principle.

The Novikov Self-Consistency Principle

The Novikov Self-Consistency Principle simply states that anything that cannot happen, will not happen. In other words, if you go back in time and try to kill your grandfather, you will always fail. Your gun will misfire at the last minute, you will have shot the wrong person, or the right person but it will turn out that he wasn’t your grandfather after all, etc. The television show LOST makes use of the self-consistency principle. Daniel Faraday repeatedly explains that no matter what they try to do, the future will not change, because whatever happened is immutable and has already happened, even if the time-traveling protagonists are at an earlier place in the timeline. Ben cannot be killed as a child, the Dharma Initiative cannot be saved, simply because it didn’t happen.

I do not find this theory particularly compelling. There is nothing in the universe to suggest that it actively attempts to sort out paradoxes at a macro level. If you shoot someone, they will die, and to suggest that the universe somehow “knows” to protect them seems to be so fanciful as to make the theory meaningless. This also does not explain the ontological paradox.

The Many Worlds Theory

The many worlds theory, popularized in D.C. Comics with their “multiverse,” and based on the Heisenberg Uncertainty Principle which says that the states of certain particles at the quantum level are not fixed until observed, and that until they are observed they exist in multiple states at once, is much more compelling. It is referenced in Back to the Future and used in comic book literature and other works of fiction, including the television show Sliders and the Michael Crichton book “Timeline.”

The idea of the multiverse is that the universe as we know it is just one of many possible universes that exist in different dimensions, and that each choice we make represents the universe that we fix in time out of the infinite universes that are possible. As it pertains to time travel, the theory goes that when we go back in time and change something, we create an alternate timeline. Our original timeline, the one that spawned us, continues on into infinity while we exist in the new, altered timeline.

This idea seems to work pretty well. It addresses the grandfather paradox: when you kill your grandfather, you create a universe where you never existed, however you, the killer, came from a parallel universe where you did exist. It addresses the ontological paradox too. In Terminator, Kyle Reese is sent back in time to protect Sarah Connor so that John Connor will be born. He ends up becoming John Connor’s father. According to the theory, there was a “prime” universe where John Connor had some other father. In that universe, Kyle Reese was sent back in time, creating an alternate universe where Kyle Reese is John Connor’s father, as we see in the movie.

How this is handled can get complicated. In Back to the Future, Marty and his siblings start to disappear when it seems that Marty may have prevented his parents from ever falling in love. If this is an alternate universe, that shouldn’t be an issue. In “Timeline” Crichton addresses this problem by suggesting that events in an alternate timeline have a “ripple effect.” That over the course of time, minor changes happen in the original timeline so that it will “catch up,” and become consistent with that timeline. In other words, events in one timeline can have an effect on others.

I feel that the many worlds theory is pretty effective in addressing the metaphysical objection, and as I stated in my first post, the metaphysical objection doesn't trouble me that much. The many worlds theory does also address the logical objection to some extent. If travelers going back in time are always creating alternate timelines, we shouldn’t expect to ever meet one in our “prime” universe. However I don’t find this entirely compelling. Somehow it seems that we still might receive a visitor from an alternate future, so that our prime timeline is their alternate one, or that the ripple effect should still produce premature time travel in our universe. I feel that there are stronger rebuttals to the “Time Tourist” objection, which is tied in with the rebuttal to the physical objection (hint: Wormholes), and I’ll discuss those in Part II.

Why I Hate Time Travel

The summer blockbuster season has arrived and it seems that the words of the day are “time travel.” Time travel is all the rage, and appears prominently in the latest “Star Trek” installment, as well as being a key element of Terminator: Salvation. Time travel was also a frequent theme of the Terminator television series, and of course is crucial to ABC’s ever popular LOST.

Time Travel in Science Fiction

While the latest Star Trek movie installment was hailed as “original” and “groundbreaking,” time travel is actually an extremely common element of the Star Trek series. It was the theme of four Star Trek Movies (“The Voyage Home,” “Generations” and “First Contact,” in addition to the latest installment), and has appeared multiple times in every Star Trek series (TOS: City on the Edge of Forever, Assignment: Earth, TNG: Yesterday’s Enterprise, Time’s Arrow, DS9: Little Green Men, Trials and Tribble-ations, VOY: Future’s End, Relativity, ST:E: Cold Front, Zero Hour).

The Terminator series is completely reliant on time travel to tell its story. Clearly time travel is a popular device for purveyors of science fiction. So why do I hate it so much?

Problems with Time Travel

My problems with time travel, like time travel itself, span multiple dimensions. These dimensions are Physical, Metaphysical, Logical and Aesthetic. To address each of these in turn:

Physical:

Time travel the way it is depicted in most fiction is impossible. This, frankly, is the least of my concerns with time travel, as science fiction is generally predicated on the impossible. However, I just thought I’d put it out there. The whole idea of time travel is usually designed around Einstein’s Relativity theories, which essentially state that how fast time moves depends on your perspective, and that space and time exist together along a continuum. The faster you are moving and the farther away you are from an object, the slower time appears to you relative to the object that isn’t moving as fast or that you are far away from. The theory continues to suggest that if you could move fast enough, you could theoretically move backwards through the time stream, and there are in fact particles that do this, called tachyons.

The problem with all of this for say, Ambassador Spock, is that as one approaches the speed of light, one’s mass becomes infinite, and the human (or Vulcan) body is not really equipped for infinite mass, so anyone traveling through a black hole or some kind of particle accelerator might reappear back in time, but they would do so as so much mush.

Metaphysical:

Again, the physical objection is no big deal. Superman shouldn’t be able to fly either and I’m fine with that. I’m also not too caught up in the metaphysical problems, but I should address them as well.

The metaphysical problems are the paradoxes. There is the classic “Grandfather Paradox;” if you go back in time and kill your grandfather, you will never be born, and therefore you can never go back in time to kill your grandfather. There is the equally troubling “Ontological Paradox,” which comes up much more often. For example in Terminator, John Connor sends Kyle Reese back to protect his mother. Reese ends up in a relationship with Connor’s mother and becomes his father. But who was there to send Reese back the “first time?” That is to say, before the events of Judgment Day happened, who fathered John Connor?

Another example occurs in Star Trek. Scotty needs to transport the heroes onto a moving spaceship, but the technology hasn’t been invented yet. Future Spock assures Scotty that he will one day invent such technology, and in fact provides New Scotty with the required information. The question now becomes, where did this information come from in the first place?

It also appears in LOST. Richard Alpert in the past gives Locke a compass. Locke later gives this compass to Alpert with instructions to give it to him in the past. So what is the compass’ origin? Again, there is a rebuttal to these paradoxes, and these issues don’t concern me overmuch, although they are annoying.

Logical:

The logical objection IS one that concerns me. Although there is a rebuttal, it is NEVER used in fiction to my knowledge, certainly not in Star Trek movies. Here goes. The premise of this objection is that time travel isn’t possible because it doesn’t exist right now. You can’t say “it hasn’t been invented yet” because there is no “yet,” since time travel is involved. If it is discovered anywhere in the timestream, then it must exist everywhere. Some might argue that this is okay because whoever travelled back kept it a secret, or met people who could not understand or evaluate the technology. But that assumes that time travel works like so:

One person travels from point A to Point B, and possibly back, no harm no foul. But if time travel is possible, there are an infinite number of travels, like so:

For as long as human beings exist in time, people will be going back, making anachronistic holes in the time line like so much swiss cheese. With an infinite number of travelers, eventually one will make time travel technology possible at an earlier time, which will then lead to infinitely more travelers between that earlier time and other times, until time travelers are EVERYWHERE. And as far as I can tell, they are not.

Aesthetic:

There are even rebuttals to the logical argument, but there is no rebuttal to the aesthetic argument, which is that time travel is just messy. In Star Trek, the 2009 movie, The Romulans go back in time and wipe out Vulcan. This causes the hundreds of years of fictional history and the decades of real Star Trek history to be wiped out. All the great Star Trek mythology you thrilled to as a child, well, most of it just never happened, cause the Romulans went back in time. How then, can I be expected to invest myself in this new group of characters, when I know that someday, the Romulans could go back in time and destroy the escape ship that contained the unborn Captain Kirk, or destroy the Earth in 1776, or take over the Federation in 2214 with advanced 25th century technology?

Furthermore, there is the Slippery Slope issue which I find so grating that the story is nearly impossible for me to enjoy. In Star Trek, the Romulan mining ship goes back in time and destroys Vulcan. Now that Starfleet is aware of this, why not send a Starfleet force back to where the Romulans will someday pop into the sky and destroy them before they do it? Why not send an espionage force to kill Captain Nero’s mother, a la Terminator? It seems to me that if you can go back and change things, you can always send someone somewhere else in the timeline to change things back. And that’s why I hate time travel stories.

Note: There are some valid rebuttals to all but the aesthetic argument, and hence some time travel concepts/stories that work. I’ll address those in my next post.