Jeffrey Sachs is also a strong proponent of decreasing the effects of overpopulation. In 2007, Jeffrey Sachs gave a number of lectures (2007 Reith Lectures) about population planning and overpopulation. In his lectures, called "Bursting at the Seams", he featured an integrated approach that would deal with a number of problems associated with overpopulation and poverty reduction. For example, when criticized for advocating mosquito nets he argued that child survival was, "by far one of the most powerful ways", to achieve fertility reduction, as this would assure poor families that the smaller number of children they had would survive. Opposition The Catholic Church has opposed abortion, sterilization, and artificial contraception as a general practice but especially in regard to population planning policies. Pope Benedict XVI has stated, "The extermination of millions of unborn children, in the name of the fight against poverty, actually constitutes the destruction of the poorest of all human beings." The reformed Theology pastor Dr. Stephen Tong also opposes the planning of human population. Pro-natalist policies In 1946, Poland introduced a tax on childlessness, discontinued in the 1970s, as part of natalist policies in the Communist government. From 1941 to the 1990s, the Soviet Union had a similar tax to replenish the population losses incurred during the Second World War. The Socialist Republic of Romania under Nicolae Ceaușescu severely repressed abortion, (the most common birth control method at the time) in 1966, and forced gynecological revisions and penalties for unmarried women and childless couples. The surge of the birth rate taxed the public services received by the decreţei 770 ("Scions of the Decree 770") generation. A consequence of Ceaușescu's natalist policy is that large numbers of children ended up living in orphanages, because their parents could not cope. The vast majority of children who lived in the communist orphanages were not actually orphans, but were simply children whose parents could not afford to raise them. The Romanian Revolution of 1989 preceded a fall in population growth. Balanced birth policies Nativity in the Western world dropped during the interwar period. Swedish sociologists Alva and Gunnar Myrdal published Crisis in the Population Question in 1934, suggesting an extensive welfare state with universal healthcare and childcare, to increase overall Swedish birth rates, and level the number of children at a reproductive level for all social classes in Sweden. Swedish fertility rose throughout World War II (as Sweden was largely unharmed