Define the following concepts: utilitarianism, utility, intrinsic good, instrumental good, basic nedd, mere wants, rule-utilitarianism, rights, legal rights, moral rigths, negative rihs, positiv rights, contractual rights, categorical imperative (both versions), the libertarian view on rights, distrubutive justice, the fundamental (or formal) principle of distributive justice, material principle of justice, egalitarian justice, capitalist justice, socialist justice, libertarian justice, justice as fairness, principle of equal liberty, difference principle, principle of fair equality of opportunity, the "origunal position, " retributive justice, compesatory justice, caring, ethic of caring, concrete relationship, virtue, ethics of virtue, prototype, casuist reasoning.