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.
David BrinBeware of self-indulgence. The romance surrounding the writing profession carries several myths: that one must suffer in order to be creative; that one must be cantankerous and objectionable in order to be bright; that ego is paramount over skill; that one can rise to a level from which one can tell the reader to go to hell. These myths, if believed, can ruin you. If you believe you can make a living as a writer, you already have enough ego.
David Brin