As obvious as this conclusion might seem, the world has taken millennia to reach it – and, in many ways, has yet to accept it fully. Nonetheless, we can now collectively look back at our slave-owning, wife-beating, child-brutalizing, heretic-burning, colonizing forebears and wonder how even the most profoundly moral among them failed to see that they should not behave that way.
这一结论显而易见，但世界用了几千年的时间才得出这一结论——并且，从很多角度看，仍然没有完全接受这一结论。尽管如此，如今我们仍可能集体回忆我们的蓄奴、家暴、虐童、烧死异端、殖民他人的祖先，奇怪于即使是他们当中最讲道德的人也没有意识到他们不应该这样做。是什么推动了这一进步？