The big bang to be specific. One of my favorite questions in philosophy considers the big bang: what happened before the big bang? What was there? What did the universe look like? Was there one speck of matter? Something about the scale and the absolute unattainable nature of the answer appeals to me. In a recent over-pint chat, a friend brought up an answer to this question that I particularly enjoyed. Before leaking his (stolen) view, we should look at some of the quirks of the question in general.
Usually when someone asks how the universe began, people answer “the big bang.” Even the precocious little 4th and 5th graders I teach unhesitatingly answer. Some 13.7 billion years ago something BIG happened. A hugely concentrated clump of matter/energy spawned some quarks and stuff in some ridiculously small amount of time. Yup, I took physics. Luckily I don’t even really need to know what happened to think about the meaty philosophical chunks inherent in the beginning of the universe.
It appears as though we have a couple of options to consider when looking at the stretch of time before the big bang. Either there was something…or there was nothing. If there was something we have two further options to break it into: this something caused the big bang or there just happened to be something there…chilling. Our intuitions give support to the claim that something had to have caused the big bang. Just by looking around and reasoning I’m pretty confident in saying that nothing in this world happens without a cause. Think about it. Can you come up with a counterexample? It’s tough. The big bang shouldn’t violate this rule, something must have been there to cause it. Who knows what this looked like: more matter, a giant watermelon, God? The point is that there was something. But that something can’t violate our rule either. Something must have caused it. And something must have caused it, and so on. Forever. Can something ever actually come from nothing? Can anything exist forever? Neither of these options is particularly attractive.
I hadn’t truly entertained the other option: nothing existed. Before chatting with a physicist I was fairly convinced that everything had a cause and that causes happened in a linear fashion. My brain tells my leg to move, my leg moves, a soccer ball comes into contact with my leg, and the ball sails wide of the goal. Connections appear from one moment to the next. But these causations only work in our 4-dimensional world. Time is linear for us and that’s the only way we can perceive things. Here’s where it gets really wacky. The big bang is an expansion of dimensions; not only space but time as well. Our universe almost instantly transforms from a 1-dimensional place to a 4-dimensional place. In other words, my favorite question may not even be accurate. Time didn’t exist before the big bang…nothing did. (Credits to Stephen Hawking for the idea and Mckay for explaining it to me)