Also, as people in the leading country become richer, they tend to not work as hard. They enjoy more leisure, pursue the finer and less productive things in life, and at the extreme become decadent. Values change from generation to generation during the rise to the top—from those who had to fight to achieve wealth and power to those who inherited it. The new generation is less battle-hardened, steeped in luxuries, and accustomed to the easy life, which makes them more vulnerable to challenges.
