A moral theory is a form of consequentialism if and only if it assesses acts and/or character traits, practices, and institutions solely in terms of the goodness of the consequences. Historically, utilitarianism has been the best-known form of consequentialism. Utilitarianism assesses acts and/or character traits, practices, and institutions solely in terms of overall net benefit. Overall net benefit is often referred to as aggregate well-being or welfare. Aggregate welfare is calculated by counting a benefit or harm to any one individual the same as the same size benefit or harm to any other individual, and then adding all the benefits and harms together to reach an aggregate sum. There is considerable dispute among consequentialists about what the best account of welfare is.