Focus on this artwork and analyze the abstract.
Chain Reaction is a peace monument and public art sculpture composed of a metal framework of stainless steel and fiberglass surrounded by concrete, depicting a mushroom cloud created by a nuclear explosion.  Designed by American editorial cartoonist Paul Conrad and built by Peter M. Carlson, the 5.5-ton, 8-meter (26-foot) high sculpture was installed in 1991 adjacent to the Santa Monica Civic Center in Santa Monica, California.An inscription at the base of the sculpture reads, "This is a statement of peace. May it never become an epitaph." The theme of the sculpture reflects the subject of nuclear disarmament. UCLA professor Paul Von Blum places the sculpture in the category of late 20th and early 21st century contemporary American public political artwork in the tradition of commemorative works throughout the United States, calling the work "a powerful warning about the continuing dangers of nuclear war".Conrad first expressed interest in building the sculpture in either Beverly Hills or Santa Monica in 1988.  He built the sculpture with the help of an anonymous donation of $250,000 and donated the sculpture to the city of Santa Monica after it was approved by the city.  It was later revealed that the donation came from philanthropist Joan Kroc, widow of Ray Kroc, the founder of the McDonald's corporation. Joan Kroc spent millions campaigning for nuclear disarmament in the 1980s.  In 2012, the sculpture became the first work of public art designated as a  historic landmark in the City of Santa Monica.
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