I'm sorry to say but you cannot provably claim this as there's never been a control group. There are disconnected people groups which do not live very long and

I'm sorry to say but you cannot provably claim this as there's never been a control group. There are disconnected people groups which do not live very long and their cultures are stagnant. And I'd suggest that the most recent century has seen the most development concurrent with massive growth in lifespan...