Abstract Expressionism received a mixed reception from critics in the 1940s and 1950s. Some critics praised its originality and emotional power, while others condemned it as chaotic and meaningless.

Clement Greenberg, Harold Rosenberg, and Thomas B. Hess were all prominent critics who championed Abstract Expressionism in the 1940s and 1950s.

Harold Rosenberg's essay "The American Action Painters" was published in 1952 and is considered to be one of the most important texts on Abstract Expressionism.

Clement Greenberg was the first critic to use the term "Abstract Expressionism" and he famously declared that it was "a new kind of painting" in his 1948 essay "The New Painting".

The Museum of Modern Art's "Fifteen Americans" exhibition, which opened in 1952, was the first major museum exhibition to focus on Abstract Expressionism.

Arshile Gorky died in 1948, four years before the Museum of Modern Art's "Fifteen Americans" exhibition opened. Therefore, he was not included in the exhibition.

The Irascibles was a group of Abstract Expressionist artists who signed an open letter to the Museum of Modern Art protesting its "Fifteen Americans" exhibition. The letter was published in Life magazine in 1951.

Jackson Pollock was the leader of The Irascibles and he was the one who signed the open letter to the Museum of Modern Art.

The Ninth Street Show was an exhibition that featured the work of The Irascibles. The exhibition was held in 1951 at the New York City loft of Leo Castelli.

Abstract Expressionism continued to receive a mixed reception from critics in the 1960s and 1970s. Some critics continued to praise its originality and emotional power, while others continued to condemn it as chaotic and meaningless.

Hilton Kramer was one of the most vocal critics of Abstract Expressionism in the 1960s and 1970s. He famously declared that Abstract Expressionism was "a dead end" in his 1973 essay "The Triumph of Modernism".

The Whitney Museum of American Art's "Abstract Expressionists and Imagists" exhibition, which opened in 1961, is considered to be the exhibition that marked the end of Abstract Expressionism as a dominant force in the art world.

Abstract Expressionism had a profound impact on the art world. It helped to establish New York City as the center of the art world, it inspired a new generation of artists, and it led to the development of new art movements.

Arshile Gorky is considered to be the father of Abstract Expressionism. He was the first artist to consistently use automatic drawing and other gestural techniques to create abstract paintings.

Jackson Pollock is considered to be the most important figure in Abstract Expressionism. He was the first artist to achieve international fame for his abstract paintings and his work had a profound impact on the development of the movement.