John Winston Ono Lennon is a British rock musician, singer, poet, composer, artist, writer and activist. Co-founder and member of The Beatles band, one of the most popular musicians of the 20th century. After the breakup of The Beatles, he began a solo career, but in 1980 he was killed by a former band's fan.
In addition to his musical activities, he was also known as a political activist. He expressed his views both in songs and in public speaking. The famous song "Imagine" expresses thoughts about how the world should work. He preached ideas of equality and brotherhood of people, peace, freedom. This made him a hippie idol and one of the most significant public figures of the 1960s and 1970s.