To what events do you think the charter is referring by the Phrase, "the scourge of war , which twice in our lifetime has brought untold sorrow "?

it depends on which society you are referring to. many civilization performed rituals so the gods would with their growing season but the most well known is that of the aztecs. they would make sacrifices, usually animals, but sometimes humans as well.

answer; no longer than a reasonable period of time;