Colombian poet and novelist whose novel La vorágine (1924; The Vortex), a powerful denunciation of the exploitation of the rubber gatherers in the upper Amazon jungle, is considered by many critics to be the best of many South American novels with jungle settings.

Rivera, a lawyer by profession, established his literary reputation with Tierra de promisión (1921; “The Promised Land”), a collection of sonnets portraying the untamed beauty of the Colombian tropics. In 1922 he was appointed to a government commission to settle a dispute over the boundary between Colombia and Venezuela. He traveled through the Amazon region and along the Orinoco River, living for a time among the Indians and gaining an intimate knowledge of the violence of the jungle and the constant struggle necessary to survive in it.

Rivera contracted beriberi in the jungle and during his convalescence wrote La vorágine, combining firsthand knowledge with poetic vision and a talent for vivid description. La vorágine succeeds both as a novel of adventure and of social protest. Translated into several languages, it brought Rivera international recognition. It was his only novel.