It was an article of faith in eighteenth-century British thought that civilized societies usually formed out of the fundamental human need for security to ensure survival, but the same societies were gradually corrupted by a preoccupation with luxuries, which resulted in decadence. The rise and fall of the Roman Empire stood behind such theorizing; what Franklin did was to shift the focus to human biology. Underneath all human endeavors were gut-level animal instincts—and foremost for Franklin was the push and pull of pain and pleasure. Too much pleasure produced a decadent society; too much
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