Bachelor in the United States History, King College, Virginia, Tennessee, 1952. Master of Arts in the United States History, University Richmond, 1960. Doctor of Philosophy in Latin American History, American University, 1973.
Diploma, Escola Superior de Guerra, Rio de Janeiro, 1979.
Professor history Longwood College, Farmville, Virginia, 1961-1965. President Vieira Enterprises Inc., Caldwell, New Jersey, 1968-1973. Professor history University Brasilia, Brazil, 1973-1993.
Chairperson department history University Brasilia, 1974-1978. President University Brasilia Press., 1978-1979. Consultant, representative Federal University Amapá, Brasilia, 1998, vice-rector, 1998.
Member National Commission for the Celebration of the 500th Year of the Discovery of Brazil, since 1998. President Foundation for Development of Research and Culture of Federal University Amapá, 1998.
Member Pi Sigma Alpha, Phi Alpha Theta.
Son of Aggeu Vieira da Silva and Noemi (Gueiros) Vieira. Married Anne Taylor Pettit, July 3, 1952 (divorced 1967). Children: David Junior, Taylor.
Married Heloisa Guimaraes Domingues, April 16, 1973. Children: Daniel, Regina Maria.