This is a review of what the currently dominant theories of moral decision-making are and where they derive from. While the introduction serves as a common ground to explain what moral decision-making is, the earlier parts of the thesis describe older traditionalist theories within the field, theories of emotional decision-making, in the form of the somatic marker hypothesis, as well as critique of the older traditionalist theories through the social intuitionist model. Both of these two theories are explained as the foundation of the current theories of moral decision-making and after establishing a clear basis on what the currently dominant theories of moral decision-making are built on, said theories are introduced in the form of the dual-processing theory and the event-feature-emotion complexes which are thoroughly reviewed, explained in detail and serves as the core of the text. This is afterward followed by criticism as well as arguments in favor of both theories as well as criticisms from other researchers who disagree with the methodology which the theories of moral decision-making are conducted on. The essay reviews the current state of the field of moral decision-making which has been split up into two different approaches, the locationist approach and the constructionist approach. The essay concludes that there are terms which needs to be clarified in order for the field to move forward and studies to be made regarding the social implications of gut reactions in moral decision-making.