force in the 1980s and many jihadist organizations, including Al Qaeda, were set up. By 1986, nationalism was making a comeback in the Eastern Bloc, and the desire for democracy in socialist states, combined with economic recession, resulted in Mikhail Gorbachev's glasnost and perestroika, which reduced Communist Party power, legalized dissent and sanctioned limited forms of capitalism such as joint ventures with companies from capitalist countries. After tension for most of the decade, by 1988 relations between the communist and capitalist blocs had improved significantly and the Soviet Union was increasingly unwilling to defend its governments in satellite states. 1989 brought the overthrow and attempted overthrow of a number of governments led by communist parties, such as in Hungary, the Tiananmen Square protests of 1989 in China, the Czechoslovak "Velvet Revolution", Erich Honecker's East German regime, Poland's Soviet-backed government, and the violent overthrow of the Nicolae Ceaușescu regime in Romania. Destruction of the 155-km Berlin Wall, at the end of the decade, signaled a seismic geopolitical shift. The Cold War ended in the early 1990s with the successful Reunification of Germany and the USSR's demise after the August Coup of 1991. The 1980s saw great advances in genetic and digital technology. After years of animal experimentation since 1985, the first genetic modification of 10 adult human beings took place in May 1989, a gene tagging experiment which led to the first true gene therapy implementation in September 1990. The first "designer babies", a pair of female twins, were created in a laboratory in late 1989 and born in July 1990 after being sex-selected via the controversial assisted reproductive technology procedure preimplantation genetic diagnosis. Gestational surrogacy was first performed in 1985 with the first birth in 1986, making it possible for a woman to become a biological mother without experiencing pregnancy for the first time in history. The 1980s was also an era of tremendous population growth around the world, surpassing the 1970s and 1990s, and arguably being the largest in human history. Population growth was particularly rapid in a number of African, Middle Eastern, and South Asian countries during this decade, with rates of natural increase close to or exceeding 4% annually. The 1980s saw the advent of the ongoing practice of sex-selective abortion in China and India as ultrasound technology permitted parents to selectively abort baby girls. The global internet took shape in academia by the second half of