You are considering whether to buy a product. You look at the reviews. Would the following review decrease or increase the chances of you buying the product?
Review title: Biased History as a Goal
Product review: Howard Zinn is a hard left-wing academic historian who believes there is no such thing as "objective" history. But he takes this idea further. He argues that historians should not even TRY to write balanced or comprehensive history, but instead they should write a version that supports the political and social values they support. He doesn't care about presenting both sides of a story, leaving it to other historians to tell the other side. In other words, Zinn puts ideology and propoganda over objectivity. He doesn't care if the resulting work is distorted, one-sided or misleading; he argues that if readers want balance they should read somebody else's work and sort things out for themselves. This book is a result of that approach. History of this kind is a lot easier to write, and left-wingers love it. Hence its popularity in undergraduate curriculum.
