Answer: Narcissistic
Explanation:
People suffering from NARCISSISTIC PERSONALITY DISORDER demonstrate an extreme sense of self importance coupled with a lack of empathy for others.
They are insensitive to other people's feelings but are envious of other people and believe other people are envious of them as well.
Morty is suffering from this personality disorder.
Imperialism is a policy, or a goal, which has as its aim extending one's influence over other countries.
It can lead to a war if the other country, the one that the empire wants to gain control over, resists, or if another empire is interested in it and fights with this empire over this new country.
