Heberto Castillo

Heberto Castillo Martínez (1928 to 1997) was a Mexican civil engineer, political activist and the inventor of the tridilosa, a structural slab system. Born in Ixhuatlán de Madero, Veracruz, he received a bachelor's degree in civil engineering from the National Autonomous University, taught courses at the UNAM and the National Polytechnic Institute, and wrote several textbooks. He became involved in workers' rights struggles, was imprisoned in the Lecumberri Penitentiary, and co-founded three political parties: the Mexican Workers' Party, the Mexican Socialist Party and the Party of the Democratic Revolution. In 1988 he withdrew from the presidential race to support the unified candidacy of Cuauhtémoc Cárdenas, and he died in Mexico City in 1997.