Book Reviews : The Reality of Foreign Aid. By WILLARD L. THORP. (New York : Praeger Pub lishers, for the Council on Foreign Relations, 1971. Pp. xiv, 370. $12.50.) The Crisis of Development. By LESTER B. PEARSON. (New York: Praeger Pub lishers, for the Council on Foreign Relations, 1971. Pp. viii, 117. $4.95.) Seeds of Change: The Green Revolution and Development in the 1970's. By LES TER R. BROWN. (New York: Praeger Publishers, for the Overseas Develop ment Council, 1970. Pp. xv, 205. $6.95 cloth, $2.50 paper.)