Modern China’s forgetfulness did not start or end with Tiananmen. Even before the summer of 1989, dozens of darker, crueler incidents lay hidden in Chinese history. Today’s leaders cannot acknowledge their stated ideology before 1949, the principles that helped the Communists gain power over the Nationalist government: establishing a democratic and law-abiding society, ending the one-party system and having an independent judiciary. In 1989, the students in Tiananmen Square asked for those same things. Since then, they’ve become unmentionable.