There are good and right ideas in any political system. For example, in modern democratic capitalist states there is freedom of speech, there is a reasonable freedom that is useful to all mankind. But there are also negative aspects - this is a ban on the prohibition of bad and destructive parties. So it is in the socialist countries of the past and present. There are both good and bad.

At the moment, there are no examples of the right productive and reasonable state. However, we can take all the best from all examples. I am sure that everything is possible, and in the future everything will become even better than now.