Enlargement of the United Nations members, or were dissolved. The UN officially came into existence on 24 October 1945, after ratification of the United Nations Charter by the five permanent members of the United Nations Security Council (China, France, the Soviet Union, the United Kingdom, and the United States) and a majority of the other signatories. A total of 51 original members (or founding members) joined that year; 50 of them signed the Charter at the United Nations Conference on International Organization in San Francisco on 26 June 1945, while Poland, which was not represented at the conference, signed it on 15 October 1945. Below
San Francisco in the 1970s but also rock music and disco thrived in the city in the 1970s, and from the late 1970s onwards San Francisco also became a major focal point in the North American and international punk, thrash metal, and rave scenes. In 1967, thousands of young people had entered the Haight-Ashbury district during what became known as the Summer of Love. The San Francisco Sound emerged as an influential force in rock music, with such acts as Jefferson Airplane and the Grateful Dead achieving international prominence. These groups blurred the boundaries between folk, rock and jazz traditions and further developed rock's lyrical