Kropotkin, [245].
Ladd, [30].
Lang, [114].
Lange, [41].
Language, and emotion, [235-39]; and logic, [235], [239-42]; and thought, [218-21]; as a social habit, [217-18], [222]; changes in, [222-35]; importance of for civilization, [15], [217]; man alone possesses, [14], [214-15]; origin of, [216-17]; primitive, [220-21], [230]; uniformities in, [227-28], [231-33].
Law, and morals, [457-59]; and society, [22], [106]; scientific, [61], [371].
Leadership, instinct of, [22], [118], [123]; submission to, [116-19], [123].
Learning, affected by age, fatigue, and health, [12], [32]; capacity for in men and animals, [11]; drill and attention in, [31]; importance of habit of, [37], [53], [59-60], [430]; process of, [6-10], [31] (see also Education, and Reflection); trial-and-error, [7].
Le Bon, [91].
Lee, Frederick S., [77].