“But the curse of every ancient civilization was that its men in the end became unable to fight. Materialism, luxury, safety, even sometimes an almost modern sentimentality, weakened the fibre of each civilized race in turn; each became in the end a nation of pacifists, and then each was trodden under foot by some ruder people that had kept that virile fighting power the lack of which makes all other virtues useless and sometimes even harmful.” -Teddy Roosevelt