Alvin Ailey was an American choreographer and activist who founded the ALVIN Ailey American Dance Theater in 1958. He is widely regarded as one of the most influential choreographers of the 20th century, and his works are still performed around the world today. Ailey's choreography combined elements of modern dance, ballet, jazz, and African-American spirituals to create a unique style that has been described as 'dance of the people.' He was also a passionate advocate for civil rights and social justice, and his work often addressed issues of race, gender, and identity.