In "The Animate and the Inanimate" (1925), Sidis predicted the existence of regions of space where the second law of thermodynamics operated in reverse to the temporal direction that we experience in our local area. Everything outside of what we would today call a galaxy would be such a region. Sidis claimed that the matter in this region would not generate light. Sidis's "The Tribes and the States" (c. 1935) employs the pseudonym "John W. Shattuck", purporting to give a 100,000-year history of the Settlement of the Americas, from prehistoric times to 1828. In this text, he suggests that "there were red men at one time in Europe as well as in America".