Wallace had a wide range of interests, and wrote books about all of them. He wrote against vaccination, for phrenology, for spiritualism, for land nationalisation, against the moon having canals, and for social change and the progress and improvement of mankind. He did not believe in religion, but he did believe in spiritualism. He was a radical in politics, economics and social reform. He was a kind and honourable person, but he could be a tough opponent if he thought something unfair was going on. Even the titles of some of his books were sensational, as for example: