From Christianity and the barbarian kingdoms of the west emerged the medieval version of politics ______ in turn evolved the politics of our modern world.

单项选择题Danis Hayes raised the essential paradox and asked how people could have fought so hard against environmental degradation ______ themselves now on the verge of losing the war.

单项选择题The very biggest and most murderous wars during the industrial age were intra-industrial- wars that Second Wave nations like Germany and Britain ______ against one another.