Willie Hugh Nelson (born April 30, 1933) is an American country singer-songwriter, author, poet, actor, and activist. Nelson was one of the main figures of the Outlaw Movement, a subgenre of Country music that developed between the end of 1960s and early 1980s. The critical success of the albums Shotgun Willie, Phases and Stages, and the commercial success of Red Headed Stranger made Nelson one of the most recognized artists in country music. Nelson is also recognized for his contributions to charity, he is the president and one of the founding members of Farm Aid charity concert, and his activism for the legalization of marijuana and for the use of bio-fuels.