Affection is the quality by which a person feels a strong devotion, love and deep trust towards another person, state or ideology, and is a crucial emotion on many levels. Socially, affection is the foundation of monotonous relationships, and is a component evident in all constructive relationships. On a historical level affection towards a state or ideology has resulted in both positive occurrences and negative occurrences, particularly wars being fought more brutally as a result of patriotism, or the affection towards one's country. Affection is also a principle of many religions, almost invariably between deity and followers as well as between humans.