He argues instead that these institutions gradually led to deep cultural changes by encouraging people to abandon hunter-gatherer instincts-violence, impatience, and economy of effort-and adopt economic habits-hard work, rationality, and education.The problem, Clark says, is that only societies that have long histories of settlement and security seem to develop the cultural characteristics and effective workforces that enable economic growth. For the many societies that have not enjoyed long periods of stability, industrialization has not been a blessing. Clark also dissects the notion, championed by Jared Diamond in "Guns, Germs, and Steel," that natural endowments such as geography account for differences in the wealth of nations.