their distribution. Comstock was proud of the fact that he was personally responsible for thousands of arrests and the destruction of hundreds of tons of books and pamphlets. These Comstock laws across the states also played a large role in prohibiting contraceptive use and informing to unmarried women as well as the youth. They prevented advertisements about birth control as well as disabling the general sale of them. Because of this unmarried women were not allowed to get a birth control prescription without the permission of their parents until the 1970s. Comstock and his allies also took aim at the libertarians and utopians who comprised the free love movement – an initiative to promote sexual freedom, equality for women, and abolition of marriage. The free love proponents were the only group to actively oppose the Comstock laws in the 19th century, setting the stage for the birth control movement. The efforts of the free love movement were not successful and at the beginning of the 20th century, federal and state governments began to enforce the Comstock laws more rigorously. In response, contraception went underground, but it was not extinguished. The number of publications on the topic dwindled, and advertisements, if they were found at all, used euphemisms such as "marital aids" or "hygienic devices". Drug stores continued to sell condoms as "rubber goods" and cervical caps as "womb supporters". Birth control movement From World War II to 1960 After World War II, the birth control movement had accomplished the goal of making birth control legal, and advocacy for reproductive rights began to focus on abortion, public funding, and insurance coverage. Birth control advocacy organizations around the world also began to collaborate. In 1946, Sanger helped found the International Committee on Planned Parenthood, which evolved into the International Planned Parenthood Federation and soon became the world's largest non-governmental international family planning organization. In 1952, John D. Rockefeller III founded the influential Population Council. Fear of global overpopulation became a major issue in the 1960s, generating concerns about pollution, food shortages, and quality of life, leading to well-funded birth control campaigns around the world. The 1994 International Conference on Population and Development and the 1995 Fourth World Conference on Women addressed birth control and influenced human rights declarations which asserted women's rights to control their own bodies. The sexual revolution and 'the pill' In the early 1950s, philanthropist Katharine McCormick had provided