As a helpful recipe for the future, let's maybe not say X,Y,Z Ideology is DEAD but list those properties which turned out to be crucially misunderstood, unknown

As a helpful recipe for the future, let's maybe not say X,Y,Z Ideology is DEAD but list those properties which turned out to be crucially misunderstood, unknown and in the end hurting. In almost every failed/criticized ideology there are parts which still make sense and should not be thrown away. Let's not make the mistake again of blindly replace "all of communism" with "all of capitalism" f.e. This would maybe get a higher chance for the next idea to "succeed better"