Although PRI administrations achieved economic growth and relative prosperity for almost three decades after World War II , the party 's management of the economy led to several crises . Political unrest grew in the late 1960s , culminating in the Tlatelolco massacre in 1968 . Economic crises swept the country in 1976 and 1982 , leading to the nationalization of Mexico 's banks , which were blamed for the economic problems ( La Década Perdida )
Tlatelolco massacre
Tlatelolco massacre
History of Mexico