This book details a proposal for a constitutional amendment to create a Third House of Congress comprised of tribunes, appointed by lot. In the last century, the American system of representation was changed. These changes have had consequences. These consequences have created a dangerous imbalance between the common interests and the particular interests within the country. This imbalance is not well understood, even in high precincts, and many of the ideas currently esteemed by the population support the conditions of the imbalance. In part two, the Third House contains an account of the changes and the ideas supporting and discrediting those changes. Elsewhere, the Third House of Congress contains the Third House Amendment, a description of how the Third House of Congress will address many of the systemic dysfunctions in our government and our strategy to actually enact the amendment.