By Howard Rotberg, Mantua Books, 231 pp, $25 Howard Rotberg’s new book, reviewed by David W. Livingstone— Page 50 Rotberg sets out to show that tolerance has been “raised to the be-all and end-all of human existence” and to point out the problems that excessive tolerance brings in its wake: “It disarms our best minds and our future leaders from protecting the important values and freedoms for which our forefathers have fought, and even died.”