Legendary boxer Muhammad Ali, 74, died on Friday night after reportedly being put on life support on Thursday in Phoenix, Arizona. Ali, hailed to be the greatest heavy-weight boxer of all time, was originally reported to have a "brief" stay at the hospital, due to a respiratory condition, but was pronounced dead this evening, according to USA Today.Just three years after his retirement in 1977, Ali was diagnosed with Parkinson's, a degenerative disease that weakens the central nervous system. Family members believed his years of boxing contributed to his disease. Ali previously had been hospitalized for a bout with pneumonia in 2014. The Greatest will be remembered for his strength in social activism and religious belief. He is survived by his wife Yolanda and his nine children.