 Kayhan foresaw that nuclear/biological/chemical (NBC) weapons of mass destruction (WMDs), but basically nuclear ones, would bring about the end of humanity.To avert this cataclysm, he issued calls to world peace in the 1980s and 90s.One of these, "An Invitation to Peace" (1987), won widespread acclaim, among others from the Russian premier Gorbachev, the Vatican, the French president, as well as both the president and prime minister of Israel.