D. Imitation 1. Definition of Imitation. _Charles H. Judd_ 390 2. Attention, Interest, and Imitation. _G. F. Stout_ 391 3. The Three Levels of Sympathy. _Th. Ribot_ 394 4. Rational Sympathy. _Adam Smith_ 397 5. Art, Imitation, and Appreciation. _Yrjö Hirn_ 401 E. Suggestion 1. A Sociological Definition of Suggestion. _W. v. Bechterew_ 408 2. The Subtler Forms of Suggestion. _Albert Moll_ 412 3. Social Suggestion and Mass or "Corporate" Action. _W. v. Bechterew_ 415 III. Investigations and Problems 1. The Process of Interaction 420 2. Communication 421 3. Imitation 423 4. Suggestion 424 _Selected Bibliography_ 425 _Topics for Written Themes_ 431 _Questions for Discussion_ 431 CHAPTER VII. SOCIAL FORCES I. Introduction 1. Sources of the Notion of Social Forces 435 2. History of the Concept of Social Forces 436 3. Classification of the Materials 437 II. Materials A. Trends, Tendencies, and Public Opinion 1. Social Forces in American History. _A. M. Simons_ 443 2. Social Tendencies as Social Forces. _Richard T. Ely_ 444 3. Public Opinion and Legislation in England. _A. V. Dicey_ 445 B. Interests, Sentiments, and Attitudes 1. Social Forces and Interaction. _Albion W. Small_ 451 2. Interests. _Albion W. Small_ 454 3. Social Pressures. _Arthur F. Bentley_ 458 4. Idea-Forces. _Alfred Fouillée_ 461 5. Sentiments. _William McDougall_ 464 6. Social Attitudes. _Robert E. Park_ 467 C. The Four Wishes: A Classification of Social Forces 1. The Wish, the Social Atom. _Edwin B. Holt_ 478 2. The Freudian Wish. _John B. Watson_ 482 3. The Person and His Wishes. _W. I. Thomas_ 488 III. Investigations and Problems 1. Popular Notions of Social Forces 491 2. Social Forces and History 493 3. Interests, Sentiments, and Attitudes as Social Forces 494 4. Wishes and Social Forces 497