If we are to cut open a human from 2000 years back and a human from today, we would see it is all the same inside. The advancements in our civilization has nothing to do with any physical changes inside us, but rather with our ability to build and develop on the existing knowledge that is transferred from generation to generation. Once a human has found a way to harness the wind and sail a boat, we all adapt that knowledge and start looking for ways to improve. Same goes to t