This document discusses sources of unethical decision making including implicit prejudice, in-group favoritism, tendencies to overclaim credit, and conflicts of interest. It notes that implicit or unconscious biases are widespread and contrary to conscious intentions. While trainings aim to reduce unethical decisions, simply trying harder may not be enough. To make truly ethical decisions, managers must become aware of their unconscious biases and collect data to counteract biases, shape environments that challenge stereotypes, and consider alternative perspectives to broaden decision making.