500 years and look at what was what was uh humanity like 500 years ago and you will realize it was very
so if you look at every year every century 500 years ago for the last five centuries you'll see
right at the knee of that curve the last 500 years we've done more in the last 500 years and we did the
steps have been getting better last 500 years each each century takes a little bigger step in that