"Compared with the superficial and self-complacent optimism which seems to veneer the surface of society, the frequent and tragic outbursts of physicists, astronomers, geologists, biologists, and sociological socialists announcing the End of the World, surpass all that could be conceived as a Natural product of the time. The notes of warning verge on the grotesque; it is hysterically solemn; [...] a natural shock might easily turn it into a panic"