Our brain capacity did not change much in the past two thousand years, so why didn't this revolution happen earlier. The reason is religion, not only Christianity, all belief systems imposed restrictions in research and the spreading of knowledge. The question is where would we be now if at least for five hundred years, humans would have been able to study this world, in the real sense. People will argue that by embracing science we started to loose control and will give examples of wars, this is false, science didn't do this, just like religion didn't kill in the Middle Ages, we did. Even now many die for their spiritual beliefs.
This was a short article but I hope at least some of you found it useful. I see our species as being designed to learn and understand. Imagine your life if this scientific revolution would have started in the 16th century or would have continued past the destruction of the Roman Empire, remember the great centers of learning in the ancient world, the great libraries that were destroyed.