HISTORY OF ROCK AND ROLL
ROCK AND ROLL
räk'n roll' n. first so used (1951) by Alan Freed, Cleveland disc jockey, taken from the song "My Baby Rocks Me with a Steady Roll". The use of rock, roll, rock and roll, etc., with reference to sexual intercourse, is traditional in blues, a form of popular music that evolved in the 1950's from rhythm and blues, characterized by the use of electric guitars, a strong rhythm with an accent on the offbeat, and youth-oriented lyrics.
A form of popular music arising from and incorporating a variety of musical styles, especially rhythm and blues, country music, and gospel. Originating in the United States in the 1950s, it is characterized by electronically amplified instrumentation, a heavily accented beat, and relatively simple phrase structure.

The immediate origins of rock and roll lie in the late 1940s and early 1950s, through a mixing together of various popular musical genres of the time. These included the blues - particularly the electric forms being developed in Chicago, New Orleans, Texas, California and elsewhere - piano-based boogie woogie, and jump blues, which were collectively becoming known as rhythm and blues. Also in the melting pot creating a new musical form were country and western music (including Western swing and influences from traditional Appalachian folk music), jazz, and gospel music.
However, elements of rock and roll can be heard in country records of the 1930s, and in blues records from the 1920s. During that period many white Americans enjoyed African-American jazz and blues performed by white musicians. More raunchy or obviously "black" music was usually relegated to "race music" outlets (music industry code for rhythm and blues stations) and was rarely heard by mainstream white audiences. A few black rhythm and blues musicians, notably Louis Jordan, the Mills Brothers, and The Ink Spots, achieved crossover success, in some cases (such as Jordan's "Choo Choo Ch'Boogie") with songs written by white songwriters. The Western swing genre in the 1930s, generally played by white musicians, also drew heavily on the blues and in turn directly influenced rockabilly and rock and roll, as can be heard, for example, on Bob Wills' "Ida Red" (1938).
Going back even further, rock and roll can trace one lineage to the old Five Points, Manhattan district of mid-19th century New York City, the scene of the first fusion of heavily rhythmic African shuffles and sand dances with melody-driven European genres, particularly the Irish jig[1].

In 1951, Cleveland, Ohio disc jockey Alan Freed began playing rhythm and blues music for a multi-racial audience. Freed is credited with first using the phrase "rock and roll" to describe the music. However, the term had already been introduced to US audiences, particularly in the lyrics of many rhythm and blues records. Three different songs with the title "Rock And Roll" were recorded in the late 1940s; one by Paul Bascomb in 1947, another by Wild Bill Moore in 1948, and yet another by Doles Dickens in 1949, and the phrase was in constant use in the lyrics of R&B songs of the time. One such record where the phrase was repeated throughout the song was "Rock And Roll Blues," recorded in 1949 by Erline "Rock And Roll" Harris. The phrase was also included in advertisements for the film, Wabash Avenue, starring Betty Grable and Victor Mature. An ad for the movie that ran April 12, 1950 billed Ms. Grable as "...the first lady of rock and roll" and Wabash Avenue as "...the roaring street she rocked to fame".
Before then, the term "rocking and rolling", as secular black slang for dancing or sex, appeared on record for the first time in 1922 on Trixie Smith's "My Man Rocks Me With One Steady Roll". Even earlier, in 1916, the term "rocking and rolling" was used with a religious connotation, on the phonograph record "The Camp Meeting Jubilee" by an unnamed male quartette The word "rock" had a long history in the English language as a metaphor for "to shake up, to disturb or to incite". Rocking was a term used by black gospel singers in the American South to mean something akin to spiritual rapture. By the 1940s, however, the term was used as a double entendre, ostensibly referring to dancing, but with the subtextual meaning of sex, as in Roy Brown's "Good Rocking Tonight." The verb "roll" was a medieval metaphor which meant "having sex". Writers for hundreds of years have used the phrases "They had a roll in the hay" or "I rolled her in the clover The terms were often used together ("rocking and rolling") to describe the motion of a ship at sea, for example as used in 1934 by the Boswell Sisters in their song "Rock and Roll and in Buddy Jones' "Rockin' Rollin' Mama" (1939). Country singer Tommy Scott was referring to the motion of a railroad train in the 1951 "Rockin and Rollin'".

Cultural impact
Alan Freed is credited with first using the phrase "rock and roll" to describe rhythm and blues music played for a multi-racial audience. While working as a disc jockey at radio station WJW in Cleveland, he also organized the first rock and roll concert, called "The Moondog Coronation Ball" on March 21, 1952. The event proved a huge drawing card — the first event had to be ended early due to overcrowding. Thereafter, Freed organized many rock and roll shows attended by both whites and blacks, further helping to introduce African-American musical styles to a wider audience.
Rock and roll appeared at a time when racial tensions in the United States were coming to the surface. African Americans were protesting segregation of schools and public facilities. The "separate but equal" doctrine was nominally overturned by the Supreme Court in 1954, and the difficult task of enforcing this new doctrine lay ahead. This new musical form combining elements of white and black music inevitably provoked strong reactions.
After "The Moondog Coronation Ball", the record industry soon understood that there was a white market for black music that was beyond the stylistic boundaries of rhythm and blues. Even the considerable prejudice and racial barriers could do nothing against market forces. Rock and roll was an overnight success in the U.S., making ripples across the Atlantic, and perhaps culminating in 1964 with the British Invasion.
The social effects of rock and roll were worldwide and massive. Far beyond simply a musical style, rock and roll influenced lifestyles, fashion, attitudes, and language. In addition, rock and roll may have helped the cause of the civil rights movement because both African American teens and white American teens enjoyed the music. It also birthed many other rock influenced styles. Progressive, alternative, punk, and heavy metal are just a few of the genres that sprang forth in the wake of Rock and Roll.