![Muhammad Ali Muhammad Ali training Miami 1971](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-00intro.jpg?quality=85&w=2400)
By TIME Staff
![Muhammad Ali Muhammad Ali training Miami 1971](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-00intro.jpg?quality=75&w=2400)
![Ali Birthday Boxing Cassius Clay Muhammad Ali young](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-cassius-clay.jpg?quality=75&w=2400)
![Cassius Clay with Olympic Boxing Teammates Cassius Clay Muhammad Ali Olympic boxing team](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-05.jpg?quality=75&w=2400)
![Medal Winners Cassius Clay Muhammad Ali Olympic medal winners 1960](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-06.jpg?quality=75&w=2400)
![Cassius Clay Cassius Clay Muhammad Ali Louisville Kentucky 1963](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-04.jpg?quality=75&w=2400)
![MUHAMMAD ALI about 1965 with mother Odessa at the family home in Louisville, Kentucky.. Father Cassius & brother Rudolph behind Muhammad Ali mother Odessa father family Louisville Kentucky 1965](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-03.jpg?quality=75&w=2400)
![Muhammad Ali Muhammad Ali fight Louisville Kentucky 1961](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-07.jpg?quality=75&w=2400)
![Muhammad Ali formerly Cassius Clay Arrives To A Warm Welcome At The Piccidally Hotel In London The Crowds Cheer Him On As He Muhammad Ali Piccadilly Hotel London 1966](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-08.jpg?quality=75&w=2400)
![Boxer Muhammad Ali Speaking with Press Muhammad Ali draft dodging 1967](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-09.jpg?quality=75&w=2400)
![Cassius Clay Standing with Picketers Muhammad Ali Vietnam anti-war protest Los Angeles 1967](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-10.jpg?quality=75&w=2400)
![MUHAMMAD ALI WIFE & CHILDREN HEAVYWEIGHT BOXER WITH FAMILY (1971) Muhammad Ali Belinda Boyd Maryum twins Jamillah Rasheda 1971](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-11.jpg?quality=75&w=2400)
![116922999.jpg Muhammad Ali Joe Frazier Fight Century 1971](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-13.jpg?quality=75&w=2400)
![Ali & Frazier In 'The Thrilla In Manila' Muhammad Ali Joe Frazier Thrilla Manila 1975](https://api.time.com/wp-content/uploads/2014/11/ali_13.jpg?quality=75&w=2400)
![The Philippines, Manila : Muhammad Ali versus Joe Frazier Muhammad Ali Joe Frazier Thrilla Manila 1975](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-15.jpg?quality=75&w=2400)
![ALI DIAGNOSED WITH PARKINSON'S DISEASE Muhammed Ali Parkinsons Disease 1984](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-16.jpg?quality=75&w=2400)
![Ali In Beirut To Plea For Hostages Muhammad Ali Beirut 1985 hostages](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-17.jpg?quality=75&w=2400)
![Champ Muhammad Ali Receives Medal Of Freedom Award Muhammad Ali Medal Freedom 1986](https://api.time.com/wp-content/uploads/2014/10/ali_18.jpg?quality=75&w=2400)
![White House Millennium Celebration Muhammad Ali Bill Clinton Hillary White House](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-19.jpg?quality=75&w=2400)
![Muhammad Ali Muhammad Ali praying Berrien Springs Michigan 1996](https://api.time.com/wp-content/uploads/2014/10/ali_212.jpg?quality=75&w=2400)
![ALI FOX Muhammad Ali Michael J. Fox Senate Parkinsons Disease](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-22.jpg?quality=75&w=2400)
![22855#Abaca Muhammad Ali Laila 2005](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-23.jpg?quality=75&w=2400)
![US boxing great Muhammad Ali poses at the World Economic Forum in Davos Muhammed Ali Davos 2006](https://api.time.com/wp-content/uploads/2014/10/muhammad-ali-24.jpg?quality=75&w=2400)
More Must-Reads from TIME
- Biden Drops Out of Presidential Race , Endorses Harris to Replace Him
- Why Biden Dropped Out
- The Chaos and Commotion of the RNC in Photos
- Why We All Have a Stake in Twisters’ Success
- 8 Eating Habits That Actually Improve Your Sleep
- Stop Feeling Bad About Sweating
- Welcome to the Noah Lyles Olympics
- Get Our Paris Olympics Newsletter in Your Inbox
Contact us at letters@time.com