The fleeting systems lapse like foam,'" he mumbled what was evidently a quotation. "That's it—foam, and fleeting. All man's toil upon the planet was just so much foam. He domesticated the serviceable animals, destroyed the hostile ones, and cleared the land of its wild vegetation. And then he passed, and the flood of primordial life rolled back again, sweeping his handiwork away—the weeds and the forest inundated his fields, the beasts of prey swept over his flocks, and now there are wolves on the Cliff House beach." He was appalled by the thought. "Where four million people disported themselves, the wild wolves roam to-day, and the savage progeny of our loins, with prehistoric weapons, defend themselves against the fanged despoilers. Think of it! And all because of the Scarlet Death—
Jack London, The Scarlet Plague
civilization, plague, ruin, savages, wolves