Michael Joseph Jackson was an American singer, songwriter, dancer, and philanthropist. Dubbed the "King of Pop", he is widely regarded as one of the most culturally significant figures of the 20th century. Over a four-decade career, his music achievements broke racial barriers in America and made him a dominant figure across the world. Through his songs, stages, and fashion, he proliferated visual performance for artists in popular music, inventing such street dance moves as the moonwalk, the robot, and the anti-gravity lean. Jackson is often deemed the greatest entertainer of all time based on his acclaim and records.