Willie Hugh Nelson is an American musician, singer, songwriter, author, poet, actor, and activist. The critical success of the album Shotgun Willie, combined with the critical and commercial success of Red Headed Stranger and Stardust, made Nelson one of the most recognized artists in country music. He was one of the main figures of outlaw country, a subgenre of country music that developed in the late 1960s as a reaction to the conservative restrictions of the Nashville sound.