It's mostly a question of population sizes. The world population in their age was around 15% of what it is now, and only a fraction of those people would have h

It's mostly a question of population sizes. The world population in their age was around 15% of what it is now, and only a fraction of those people would have had access to enough of an education to be noticed as a top mathematician. So it would be astonishing if their top mathematicians beat our own.