Popular government, expense of, [328], [414].
Power manufacture, [437].
Pre-historic human types, [63], [65], [66].
Pre-historic man, types of, [28],
Pre-historic time, [60-61].
Primitive man, social life of, [31], [32]; brain capacity of, [29].
Progress and individual development, [23]; and race development, [22]; influence of heredity on, [24]; influence of environment on, [25]; race interactions and, [26]; early cultural evidence of, [32]; mutations in, [33]; data of, [34]; increased by the implements used, [35]; revival of, throughout Europe, [348]; and revival of learning, [372-373].
Progress, evidence of, [456].
Public opinion, [485].
Pueblo Indians, culture of, [194]; social life, [195]; secret societies, [196].