Self-righteous people can talk themselves into forgetting they are part of a civilization. They can then feed on that culture, bringing it down. It's happened many times in the past. It could happen to us.

青竹 云海 晨光 星夜 荷风 晴雪 秋山 听海 沙丘 森语 梅影 花野 听雨 晴窗 暮色 橘光