 The monopoly of the PRI, especially under Díaz Ordaz, had gone unchallenged prior to the 1968 student movement, but the growth of presidential power under Díaz was seen as blatantly abusive, inspiring students, peasants, and industrial workers to challenge his absolute authority.In 1968, Mexico City hosted the 1968 Summer Olympics.The Mexican government had been dealing with the effects of La Onda as minor social rebellions inspired by the American counterculture movement.