...because if you take the statements in this book as truth you will be a victim of liberal bias. This book is a reporter's and professor's way of making a buck, and it should be read with a healthy level of sarcasm.While some of the correlations noted are interesting, there is no mention of the statistical predictive power of the variables being discussed, or of variables that were tossed out because they did not influence the result: was it the legalization of abortion that resulted in a decline in violent crime, as the authors assert, or was it the widespread availability of The Pill and prophylactic contraceptives?It's an interesting book, with many cocktail party tidbits, but the "answers" are merely uncorroborated correlations.