This collection of essays targets universities, social science research institutes, teacher training colleges, and those who lecture and carry out research on the history of ideas and of education. It is the fourth volume in a series that presents, in English, French, and Spanish, a comprehensive view of great educators of every age and culture. Each essay includes two bibliographies, one that lists the works actually concerned with education and the other on the actual thinker. The essays are as follows: "Carl Rogers" (Fred Zimring), "Jean-Jacques Rousseau" (Michel Soetard), "Torsten Rudenschold" (Gunnar Richardson), "Michael Ernest Sadler" (James Henry Higginson), "Otto Salomon" (Hans Thorbjornsson), "Domingo Faustino Sarmiento" (Hector Felix Bravo), "Antonio Sergio" (Antonio Novoa), "B.F. Skinner" (Louis M. Smith), "Herbert Spencer" (Brian Holmes), "Rudolf Steiner" (Heiner Ullrich), "Bogdon Suchodolski" (Irena Wojnar), "Sun Yat-Sen" (Zhang Lanxin), "Rabindranath Tagore" (Narmadeshwar Jha), "Rifa'a Al-Tahtawi" (Said Ismail Ali), "Leo Tolstoy" (Semion Filippovitch Yegorov), "Agoston Trefort" (Istvanne Kiss), "Davorin Trstenjak" (Nedjeljko Kujundzic), "Konstantin Dmitrievitch Ushinsky" (Miroslav Cipro), "Dmitry Uznadze" (Gregory Ketchuashvili), "Jose Pedro Varela" (Marta Demarchi and Hugo Rodriguez), "Jose Vasconcelos" (Rosario Encinas), "Giambattista Vico" (Maria Teresa Maiullari), "Juan Luis Vives" (Ricardo Marin Ibanez), "Lev S. Vygotsky" (Ivan Ivic), and "Henri Wallon" (Helene Gratiot-Alphandery). (SM)