Muhammad Ali, original name 
Cassius Marcellus Clay, Jr. (born 
January 17, 1942, 
Louisville, 
Kentucky, U.S.), American professional boxer and social activist. Ali was the first fighter to win the world 
heavyweight championship on three separate occasions; he successfully defended this title 19 times.
Cassius
 Marcellus Clay, Jr., grew up in the American South in a time of 
segregated public facilities. His father, Cassius Marcellus Clay, Sr., 
supported a wife and two sons by painting billboards and signs. His 
mother, Odessa Grady Clay, worked as a household domestic.
When Clay was 12 years old, he took up 
boxing
 under the tutelage of Louisville policeman Joe Martin. After advancing 
through the amateur ranks, he won a gold medal in the 175-pound division
 at the 1960 
Olympic Games in 
Rome
 and began a professional career under the guidance of the Louisville 
Sponsoring Group, a syndicate composed of 11 wealthy white men.
In
 his early bouts as a professional, Clay was more highly regarded for 
his charm and personality than for his ring skills. He sought to raise 
public interest in his fights by reading childlike poetry and spouting 
self-descriptive phrases such as “float like a butterfly, sting like a 
bee.” He told the world that he was “the Greatest,” but the hard 
realities of boxing seemed to indicate otherwise. Clay infuriated 
devotees of the sport as much as he impressed them. He held his hands 
unconventionally low, backed away from punches rather than bobbing and 
weaving out of danger, and appeared to lack true knockout power. The 
opponents he was besting were a mixture of veterans who were long past 
their prime and fighters who had never been more than mediocre. Thus, 
purists cringed when Clay predicted the round in which he intended to 
knock out an opponent, and they grimaced when he did so and bragged 
about each new conquest.
![Ali, Muhammad: statistics, 1964 [Credit: Bettmann/Corbis]](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sSJC_V2tPUSKKAF4hjH1sYColmIv22kBilaKtyoxzwUtrsD9wS8sN2sz8QRIsfXOUR8beCG_OC_fRkTo8Rv1yHLP9ctooOh0XZWnFxAjPTmac9CRaRtOF00Knjfln0dq2G7EJvb0Y-cNNxXSRm6KTtN4XYu1l3QTrrBm2hqM-9-nqaLg=s0-d)
On February 25, 1964, Clay challenged 
Sonny Liston
 for the heavyweight championship of the world. Liston was widely 
regarded as the most intimidating, powerful fighter of his era. Clay was
 a decided underdog. But in one of the most stunning upsets in 
sports
 history, Liston retired to his corner after six rounds, and Clay became
 the new champion. Two days later Clay shocked the boxing establishment 
again by announcing that he had accepted the teachings of the 
Nation of Islam. On March 6, 1964, he took the name 
Muhammad Ali, which was given to him by his spiritual mentor, 
Elijah Muhammad.
![Terrell, Ernie [Credit: UPI/Bettmann Archive]](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sRZWcrfz0X3kMU3lsbY8JBGGkbqxXxA2ITDji28oI1-jige2mV2yvHUV5TUCAuiwRp2b7iayDkq6MVp8Zy1mAC54w8jHDBKa4YXf1kUXxO6qMd6fvN_Fhbg9r425yBoAtW_2Z5-umUo7KyDbcHMSDhBSgeKxf8BzgqvNks9msnLBOUuKJNZNCUOw=s0-d)
For
 the next three years, Ali dominated boxing as thoroughly and 
magnificently as any fighter ever had. In a May 25, 1965, rematch 
against Liston, he emerged with a first-round knockout victory.
Triumphs
 over 
Floyd Patterson, 
George Chuvalo, Henry Cooper, Brian 
London, and Karl Mildenberger followed. On November 14, 1966, Ali fought 
Cleveland
 Williams. Over the course of three rounds, Ali landed more than 100 
punches, scored four knockdowns, and was hit a total of three times. 
Ali’s triumph over Williams was succeeded by victories over 
Ernie Terrell and Zora Folley.
Then, on April 28, 1967, citing his religious beliefs, Ali refused induction into the U.S. Army at the height of the 
war in Vietnam.
 This refusal followed a blunt statement voiced by Ali 14 months 
earlier: “I ain’t got no quarrel with them Vietcong.” Many Americans 
vehemently condemned Ali’s stand. It came at a time when most people in 
the 
United States
 still supported the war in Southeast Asia. Moreover, although 
exemptions from military service on religious grounds were available to 
qualifying conscientious objectors who were opposed to war in any form, 
Ali was not eligible for such an exemption, because he acknowledged that
 he would be willing to participate in an Islamic holy war.
Ali 
was stripped of his championship and precluded from fighting by every 
state athletic commission in the United States for three and a half 
years. In addition, he was criminally indicted and, on June 20, 1967, 
convicted of refusing induction into the U.S. armed forces and sentenced
 to five years in prison. Although he remained free on bail, four years 
passed before his conviction was unanimously overturned by the 
U.S. Supreme Court on a narrow procedural ground.
Meanwhile,
 as the 1960s grew more tumultuous, Ali’s impact upon American society 
was growing, and he became a lightning rod for dissent. Ali’s message of
 black pride and black resistance to white domination was on the cutting
 edge of the 
civil rights movement.
 Having refused induction into the U.S. Army, he also stood for the 
proposition that “unless you have a very good reason to kill, war is 
wrong.” As black activist 
Julian Bond
 later observed, “When a figure as heroic and beloved as Muhammad Ali 
stood up and said, ‘No, I won’t go,’ it reverberated through the whole 
society.”
In October 1970, Ali was allowed to return to boxing, 
but his skills had eroded. The legs that had allowed him to “dance” for 
15 rounds without stopping no longer carried him as surely around the 
ring. His reflexes, while still superb, were no longer as fast as they 
had once been. Ali prevailed in his first two comeback fights, against 
Jerry Quarry and Oscar Bonavena. Then, on March 8, 1971, he challenged 
Joe Frazier,
 who had become heavyweight champion during Ali’s absence from the ring.
 It was a fight of historic proportions, billed as the “Fight of the 
Century.” Frazier won a unanimous 15-round decision.
Following his
 loss to Frazier, Ali won 10 fights in a row, 8 of them against 
world-class opponents. Then, on March 31, 1973, a little-known fighter 
named 
Ken Norton
 broke Ali’s jaw in the second round en route to a 12-round upset 
decision. Ali defeated Norton in a rematch. After that he fought 
Joe Frazier
 a second time and won a unanimous 12-round decision. From a technical 
point of view, the second Ali-Frazier bout was probably Ali’s best 
performance in the ring after his exile from boxing.
On October 30, 1974, Ali challenged 
George Foreman, who had dethroned Frazier in 1973 to become heavyweight champion of the world. The bout (which Ali referred to as the “
Rumble in the Jungle”)
 took place in the unlikely location of Zaire (now the Democratic 
Republic of the Congo). Ali was received by the people of Zaire as a 
conquering hero, and he did his part by knocking out Foreman in the 
eighth round to regain the heavyweight title. It was in this fight that 
Ali employed a strategy once used by former boxing great 
Archie Moore. Moore called the maneuver “the turtle” but Ali called it “
rope-a-dope.”
 The strategy was that, instead of moving around the ring, Ali chose to 
fight for extended periods of time leaning back into the ropes in order 
to avoid many of Foreman’s heaviest blows.
Over the next 30 
months, at the peak of his popularity as champion, Ali fought nine times
 in bouts that showed him to be a courageous fighter but a fighter on 
the decline. The most notable of these bouts occurred on October 1, 
1975, when Ali and Joe Frazier met in the 
Philippines,
 6 miles (9.5 km) outside Manila, to do battle for the third time. In 
what is regarded by many as the greatest prizefight of all time (the “
Thrilla in Manila”), Ali was declared the victor when Frazier’s corner called a halt to the bout after 14 brutal rounds.
The final performances of Ali’s ring career were sad to behold. In 1978 he lost his title to 
Leon Spinks,
 a novice boxer with an Olympic gold medal but only seven professional 
fights to his credit. Seven months later Ali regained the championship 
with a 15-round victory over Spinks. Then he retired from boxing, but 
two years later he made an ill-advised comeback and suffered a horrible 
beating at the hands of 
Larry Holmes in a bout that was stopped after 11 rounds. The final ring contest of Ali’s career was a loss by decision to 
Trevor Berbick in 1981.
Ali’s
 place in boxing history as one of the greatest fighters ever is secure.
 His final record of 56 wins and 5 losses with 37 knockouts has been 
matched by others, but the quality of his opponents and the manner in 
which he dominated during his prime placed him on a plateau with 
boxing’s immortals. Ali’s most-tangible ring assets were speed, superb 
footwork, and the ability to take a punch. But perhaps more important, 
he had courage and all the other intangibles that go into making a great
 fighter.
Ali’s later years were marked by physical decline. 
Damage to his brain caused by blows to the head resulted in slurred 
speech, slowed movement, and other symptoms of 
Parkinson syndrome. However, his condition differed from 
chronic encephalopathy,
 or dementia pugilistica (which is commonly referred to as “punch drunk”
 in fighters), in that he did not suffer from injury-induced 
intellectual deficits.
Ali’s religious views also evolved over time. In the mid-1970s he began to study the Qurʾan seriously and turned to Orthodox 
Islam. His earlier adherence to the teachings of 
Elijah Muhammad
 (e.g., that white people are “devils” and there is no heaven or hell) 
were replaced by a spiritual embrace of all people and preparation for 
his own afterlife. In 1984 Ali spoke out publicly against the separatist
 doctrine of 
Louis Farrakhan,
 declaring, “What he teaches is not at all what we believe in. He 
represents the time of our struggle in the dark and a time of confusion 
in us, and we don’t want to be associated with that at all.”
Ali 
married his fourth wife, Lonnie (née Yolanda Williams), in 1986. He had 
nine children, most of whom avoided the spotlight of which Ali was so 
fond. One of his daughters, however, 
Laila
 Ali, pursued a career as a professional boxer. While her skills were 
limited, she benefited from the fact that the Ali name was still 
financially viable.
In 1996 Ali was chosen to light the Olympic flame at the start of the Games of the 
XXVI Olympiad in 
Atlanta, 
Georgia.
 The outpouring of goodwill that accompanied his appearance confirmed 
his status as one of the most-beloved athletes in the world. His life 
story is told in the 
documentary film I Am Ali (2014), which includes audio recordings that he made throughout his career and interviews with his intimates.