Sócrates was the firstborn child of Raimundo and Guiomar Vieira. He was born in Belém, Pará, and relocated with his family to Ribeirão Preto, São Paulo, in January 1960 after his father Raimundo earned an important position as revenue supervisor. This job earned Sócrates' father the status of a small-town hero in Igarapé-Açu, where the family lived at the time. His father's new salary allowed Sócrates to attend the best school in Ribeirão Preto, Colégio Marista. In a biography written by the journalist Tom Cardoso, it is revealed that the small library Sócrates' father had built in his home, containing philosophy books and other works, came under threat as of the coup d'état on 31 March 1964. Sócrates watched his father rid himself of books that he so loved; "In 1964, I saw my father tear many books, because of the coup d'état. I thought that was absurd, because the library was the thing he liked best. That was when I felt that something was not right. But I only understood much later, in college." At age 10, Sócrates was exposed to the repercussions of the military dictatorship's censorship. His childhood was marked by this event which he came to comprehend as an adult later in life.