Pythagoras, [219].
Race and language, [124].
Races, cause of decline, [201], [202].
Racial characters, [70].
Recounting human progress, methods of [37-52]; economic development, [39-40].
Reform measures in England, [415].
Reformation, the, character of, [375]; events leading to, [376-380]; causes of, [380-382]; far-reaching results of, [388-391].
Religion and social order, [113-116].
Religious toleration, growth of, [447].