Egoism may refer to any of the following:

• psychological egoism - the doctrine that holds that individuals are always motivated by self-interest
• ethical egoism - the ethical doctrine that holds that individuals ought to do what is in their self-interest
• rational egoism - the belief that it is rational to act in one's self-interest
• solipsism - (sometimes called egoism) - the belief that only one's self exists, or that only the experiences of one's self can be verified
• egotism - an excessive or exaggerated sense of self-importance. In extreme forms, egoism (as egotism) may include narcissism and antisocial behavior

Egoism may also imply or may be fundamental to any number of related concepts, such as:

• Amorality - lack of adherence to a meaningful moral system
• Antisocial personality disorder - the psychiatric disease which involves disregard for the consequences of behavior on others
• Autism - the neurodevelopmental disorder which restricts an individual's ability to interact with others normally
• Bigotry - intransigent intolerance of opinions which differ from one's own
• Individualism - a focus on the individual as opposed to society
• Individualist anarchism - anarchism that exalts the supremacy of the individual
• Libertarianism - a political ideology that advocates individual liberty and private property
• Machiavellianism - a tendency to deceive and manipulate others for personal gain
• Narcissistic Personality Disorder - self-love as psychological illness
• Objectivism - a philosophical system based on the writings of Ayn Rand that advocates egoism
• Suitheism - worship of one's own self as Deity

Egoism is advocated by - or can be claimed to be advocated by - the following:

• Harry Browne- American Libertarian Writer
• Thomas Hobbes - British philosopher
• Friedrich Nietzsche - German philosopher
• Ayn Rand - Russian-American novelist, founder of Objectivism.
• Max Stirner - German philosopher

Core issues in ethics | Philosophical terminology

Egoisme | Egoismus | Égoïsme | Egoismo | Egoizmas | 利己主義 | Egoizm | Эгоизм | Egoismi | Egoism