Evolution is a process that never stops. Baboons who fail to exhibit moral behavior do not survive; they wind up as meat for leopards.

Must be yearning deep in human heart to stop other people from doing as they please.

There is an old song which asserts 'the best things in life are free.' Not true! Utterly false! This was the tragic fallacy which brought on the decadence and collapse of the democracies of the twentieth century; those noble experiments failed because the people had been led to believe that they could simply vote for whatever they wanted...and get it without toil, without sweat, without tears. Nothing of value is free. Even the breath of life is purchased at birth only through gasping effort and pain.

Men are not potatoes!

Every time we killed a thousand Bugs at a cost of one M.I. it was a net victory for the Bugs. We were learning, expensively, just how efficient a total communism can be when used by a people actually adapted to it by evolution; the Bug commisars didn't care any more about expending soldiers than we cared about expending ammo. Perhaps we could have figured this out about the Bugs by noting the grief the Chinese Hegemony gave the Russo-Anglo-American Alliance; however the trouble with 'lessons from history' is that we usually read them best after falling flat on our chins.

There ain't no such thing as a free lunch.

One could write a history of science in reverse by assembling the solemn pronouncements of highest authority about what could not be done and could never happen.