21.  Then , his political idea was communism.

22.  His political idea is called "Communism".

23.  His political idea is "working people of all countries, unite!".

24.  It can be shown our ideas.

25.  It proved our ideas was very right.

26.  But my idea was wrong completely.

27.  But my idea for it is different that time.

28.  So my idea for this story has been changed .

29.  perhaps after many years, my idea will change.

30.  If we are right, we don't change our idea forever.