If you read Professor Bury's little book, "A History of Freedom of Thought," you will discover that there has been a long conflict over the right of men to use their minds--and the victory is not yet. The term "free thinker," which ought to be the highest badge a man could wear, is still almost everywhere throughout America a term of vague terror. In the State of California today there is a Criminal Syndicalism Act, which provides a maximum of fourteen years in jail for any person who shall write or publish or speak any words expressive of the idea that the United States government should be overthrown in the same way that it was established--that is, by force; only a few months ago the writer of this book was on the witness stand for two days, and had the painful, almost incredible experience of being battered and knocked about by an inquisitive district attorney, who cross-examined him as to every detail of his beliefs, and read garbled extracts from his published writings, in the effort to make it appear that he held some belief which might possibly prejudice the jury against him. The defendant in this case, a returned soldier who had spent three years as a volunteer in the trenches, and had been twice wounded and once gassed, was accused, not merely of approving the Soviet form of government, but also of having printed uncomplimentary references to priests and religious institutions. Nowadays it is the propertied class which has taken possession of the powers of government, and which presumes to censor the thinking of mankind in its own interest. But whether it be priestcraft or whether it be capitalism which seeks to bind the human mind, it comes to the same thing, and the effort must be met by the assertion that, in spite of errors and blunders, and the serious harm these may do, there is no way for men to advance save by using the best powers of thinking they possess, and proclaiming their conclusions to others. Speaking theologically for the moment, God has given us our reasoning powers, and also the impulse to use them, and it is inconceivable that He should seek to restrict their use, or should give to anyone the power to forbid their use. It is His truth which we seek, and His which we proclaim. In so doing we perform our highest act of faith, and we refuse to be troubled by the idea that for this service He will reward us by an eternity of sulphur and brimstone. Throughout the remainder of this book it will be assumed that the reader accepts this point of view, or, at any rate, that he is willing for purposes of experiment to give it a trial and see where it leads him. We shall proceed to consider the problems of human life in the light of reason, to determine how they come to be, and how they can be solved. CHAPTER IV THE ORIGIN OF MORALITY (Compares the ways of nature with human morality, and tries to show how the latter came to be.)