What is responsible for abo blood types

What do you mean by responsible? Do you want to know the genetics behind it, what the surface markers do, or why they are metically important? I think I can help.

Due to arising conflict in self-image and others.

In Psychology, self-actualization is process where an individual reaches and achieves their full potential and capabilities as a person. In Maslow's model, this is considered to be the highest step in the hierarchy. 
Now, most individuals do not achieve this because of conflict that occurs within the self and with other people.