let’s consider the wars, atrocities, assassinations, crises, and plagues they perpetuated and endured

Absolutely. And, while there's always atrocities and tragedies around the world, back in "those days" the height of civilization was still brutal and cruel. We, globally, seem to have improved the "bright spots" somewhat as time goes by - even if we still leave the bulk of global human population in poverty and oppression.

My point about the 75 years? There have been shorter flashes in the pan, and much longer ones, we're nothing particularly special - what is special about this era is the power that fossil fuels have endowed modern society with. We've done some good things with those, and a lot of bad too.

Because the time the world has existed includes times other than this week. And other countries.