In another work, this philosopher gave the belief in eternal punishment as a reason for the titular state in Why I am Not a Christian.
This philosopher wrote the works Authority and the Individual and New Hopes for a changing World. He advocated "Trial" and "companionship" marriages in a work that advocated premarital sex, Marriage and Morals. In another work, this philosopher gave the belief in eternal punishment as a reason for the titular state in Why I am Not a Christian. In another of this philosopher's works, he utilized symbolic logic to attempt to derive all mathematical truth through a system of types. For ten points, identify this philosopher who may collaborated with Whitehead on Principia Mathematica.
This philosopher wrote the works Authority and the Individual and New Hopes for a changing World.
Bertrand {Russell}