The document provides an overview of the evolution of Philippine constitutions from 1897 to 1987. It summarizes key details about the Biak-na-Bato Constitution of 1897, Malolos Constitution of 1899, 1935 Commonwealth Constitution, 1973 Constitution under Marcos, and the 1987 Constitution after Martial Law. The constitutions established different forms of government and were influenced by other countries and events in Philippine history, with some never fully implemented or transitioning the country towards independence.