•  4
    Qué es el hombre?
    Editorial Delfos. 1946.
    Ensayo filosófico.
  •  2
    Philosophy in Literature
    with Fedor Dostoevsky
    Thinking: The Journal of Philosophy for Children 1 (2): 27-27. 1979.
  • Letters from the Earth
    Free Inquiry 17. 1968.
  • The Diaries of Adam & Eve
    with Don Roberts
    Utopian Studies 14 (2): 213-214. 2003.
  •  10
    What is man?
    Oxford University Press. 1906.
    What Is Man? is Mark Twain's skeptical assessment of free will, and determinism, religious belief, and the nature of humanity. He put off publishing it for 25 years, and then released it anonymously in a limited edition of 250 copies. The book takes the form of a Socratic dialogue between a romantic young idealist and an elderly cynic, who debate such issues as whether man is a machine or a free actor, whether personal merit is meaningless given how our environment shapes who we are, and whether…Read more
  • Mark Twain: Social Critic
    with Philip S. Foner and Charles Neider
    Science and Society 24 (2): 180-183. 1960.