> The problem is we have short lifespans so small setbacks in humanity's history are significant to those of us alive at that point in time. It is still a reas

> The problem is we have short lifespans so small setbacks in humanity's history are significant to those of us alive at that point in time. It is still a reason to be optimistic. Limited individual lifespan is like a regularization term; one particular human can get only so much wise and world-improving; while our optimization goal is multi-generational. Those setbacks might as well be necessary backtracking.