Sadly in a sense you are correct. If you look back at history some of the greatest progressions were made during and after times of great strife. A nuclear device no. But an encompassing world war could, 1 take the striain off the planet in terms of population at this point and 2 revive the world economies. Both things unfortunately happen after humans fight large encompassing wars that kill mass amounts of other humans.A giant cataclysmic event could solve the problem. thanks heavens we invented nuclear warheads to help the cause (you know, because we are smart and stuff). So just in case nature doesn't take care of it, we always got that big red button...
Just so you are clear on this, I am not advocating for World War III. Just pointing out one of the consequences that seem to occur during and after times of great deadly conflict.