What factors have contributed to the exponential growth of the human population

We have come up with so many cures for things that would have wiped out millions of people hundreds of years ago, and our technology is so advanced it practically stopped us from evolving as a species. We dont adapt to our environments anymore, we control everything to be the way we want it to be-The dramatic increase of medical knowledge in the past 100 years is really the main cause.Im sure a bunch of people will be naive and talk about teen pregnancy, though.......