nationalism

(noun) love of country and willingness to sacrifice for it. Synonyms: patriotism. Examples: "They rode the same wave of popular patriotism." "British nationalism was in the air and patriotic sentiments ran high."

(noun) the doctrine that your national culture and interests are superior to any other.

(noun) the aspiration for national independence felt by people under foreign domination.

(noun) the doctrine that nations should act independently (rather than collectively) to attain their goals.