Lincoln, [118], [132], [146], [163].
Logic, and language, [235], [239-42].
Love, [128-33].
Lowell, [282].
Loyalty, [116-17].
Lucretius, [177], [301], [308], [363], [374], [376].
McDougall, [3], [19], [28], [42], [43], [69], [83], [86], [90], [91], [94], [111], [114], [115], [120], [124], [126], [142], [149], [171], [440].
Malthus, [245].
Man, as social being, [81-83]; primitive, [16-17]; study of, basis of ethics, [454-57]; unique characteristics of, [10-17].
Marett, [220-221].