Martí is considered one of the great turn-of-the-century Latin American intellectuals.
His written works consist of a series of poems, essays, letters, lectures, a novel, and even a children's magazine
Martí was the elder brother to seven sisters Also instrumental in his development of a social and political conscience was his best friend Fermín Valdés Domínguez, the son of a wealthy slave-owning family In April the same year(1865), after hearing the news of Abraham Lincoln's assassination, Martí and other young students expressed their pain—through group mourning—for the death of a man who had decreed the abolition of slavery in a neighboring country.
Martí signed up at the Escuela Profesional de Pintura y Escultura de La Habana (Professional School for Painting and Sculpture of Havana) in September 1867, known as San Alejandro, to take drawing classes. He hoped to flourish in this area, but did not find commercial success.
In 1869, he published his first political writings in the only edition of the newspaper El Diablo Cojuelo, published by Fermín Valdés Domínguez
On 21 October 1869, aged 16, he was arrested and incarcerated in the national jail, following an accusation of treason and bribery from the Spanish government upon the discovery of a "reproving" letter, which Martí and Fermín had written to a friend when he joined the Spanish army
More than four months later, Martí confessed to the charges and was condemned to six years in prison. His mother tried to free her son (who at 16 was still a minor) by writing letters to the government; his father went to a lawyer friend for legal support, but all efforts failed. Eventually Martí fell ill; his legs were severely lacerated by the chains