What Caused the Big Bang?

Westill dond hav, the answer, we are trying to figure itout. The very initial moments after the big bang, we don't know anything about it,. We have recreated much of it based on observational evidence. Based on all these things, we can actually uncover y what happened and possibly predict what will happen in the future. So that is my answer to that question, right? I read niil de grasteson's book, he says that the accelerated expansion of the universe will end in a 22 billion year event called 'the big rip'