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Traditionally, normative moral theory was the study what makes actions right and wrong. Classical...

Traditionally, normative moral theory was the study what makes actions right and wrong. Classical theories in this vein include utilitarianism, Kantianism, and some forms of contractarianism. These theories offered an overarching moral principle to which one could appeal in resolving difficult moral decisions.In the 20th century, moral theories have become more complex and are no longer concerned solely with rightness and wrongness, but are interested in many different kinds of moral status. This trend may have began in 1930 with D. W. Ross’ book The Right and the Good. Here Ross agues that moral theories cannot say in general whether an action is right or wrong but only whether it tends to be right or wrong according to a certain kind of moral duty such as beneficence, fidelity, or justice (he called this concept partial rightness prima facie duty). Subsequently, philosophers have been questioned whether even prima facie duties can be articulated at a theoretical level, and some philosophers have urged a turn away from general theorizing altogether, while others have defended theory on the grounds that it need not be perfect in order to capture important moral insight.In the middle of the century there was a long hiatus in the development of moral theory during which philosophers largely turned away from normative ethics towards meta-ethics. Even those philosophers during this period who maintained an interest in prescriptive morality, such as R. M. Hare, attempted to arrive at normative conclusions via meta-ethical reflection. This was in part caused by the intense linguistic turn in analytic philosophy and in part by the pervasiveness of logical positivism. In 1971, John Rawls bucked the trend against normative theory in publishing A Theory of Justice. This work was revolutionary, in part because it paid almost no attention to meta-ethics and pursued moral arguments directly. In the wake of A Theory of Justice and other major works of normative theory published in the 1970s, the field has witnessed an extraordinary Renaissance which continues to the present.