Moral blindness, also known as ethical blindness, is defined as a person's temporary inability to see the ethical aspect of a decision they are making. It is often caused by external factors due to which an individual is unable to see the immoral aspect of their behavior in that particular situation.
While the concept of moral blindness (and more broadly, that of immorality) has its roots in ancient philosophy, the idea of moral blindness became popular after the events of World War II, particularly the Holocaust. This led to more research by psychologists and some surprising findings (notably by Stanley Milgram and Philip Zimbardo) on human behavior in the context of obedience and authority bias.
Moral blindness has been identified as being a concern in areas such as business organisation and legal systems.