Collective guilt (or group guilt) is the unpleasant and often emotional reaction that results among a group of individuals when it is perceived that the group illegitimately harmed members of another group. It is often the result of “sharing a social identity with others whose actions represent a threat to the positivity of that identity.” For an individual to experience collective guilt, he must identify himself as a part of the in-group. “This produces a perceptual shift from thinking of oneself in terms of ‘I’ and ‘me’ to ‘us’ or ‘we’