It's a bit silly but that's exactly the way I tend to approach such questions and my conclusions after musing on the subject for years is that we are hamstrung

It's a bit silly but that's exactly the way I tend to approach such questions and my conclusions after musing on the subject for years is that we are hamstrung by the historical ordering of past breakthroughs. Further, it is very difficult to determine the extent to which our current ways of thinking are limiting us.