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The Guarantee Clause of the U.S. Constitution. By William M. Wiecek. (Ithaca, N.Y.: Cornell University Press, 1972. Pp. 324. $12.50.)

This analysis of one of the most sterile provisions of the Constitution is intended to persuade us that it has an "awesome potential" for social prophylaxis. It is Professor Wiecek's thesis that Congress and the Supreme Court, especially, ought to convert the guarantee of a republican form of government to the states into a requirement that they reform both their governmental and "social institutions" so as to become truly republican (p. 302). He admits the difficulties involved in activating this clause. They arise from the Delphic character of the constitutional language and the desuetude into which the clause has fallen since 1842, when, he argues incorrectly, it was last applied. Nevertheless, he has subjected the development of the clause to an historical analysis covering the period from 1787 to 1962 to determine its origin, purposes, and uses.