We will not hesitate to say that this is one of the most important books ever given to man. At age 83, it was no accidental production, but a profound masterpiece produced over fifty years of the most intense reflection and thirty years of teaching on the subject as president of colleges and as professor of mental philosophy while displaying the deepest virtue and usefulness. Before Critical History, all such philosophical histories were the gloomy revelation of the contradictory errors of men, and the natural result was pessimistic skepticism. But the author has rather sanctified the science--gleaning the truth from all who discovered it. At the same time, he more than just exposed the mistakes and sins of all contrary systems, but also gave us the reasons for departure and the fully justified--and undeniable--reality that fills in the void. This original analysis not only solves the great world problems but also gives hope to the student where all other histories have left us in contradictory despair.