Editing Collective action (section)

===Perceived injustice===
Examining collective action through perceived injustice was initially guided by [[Relative deprivation theory|relative deprivation theory (RDT)]]. RDT focuses on a subjective state of unjust disadvantage, proposing that engaging in fraternal (group-based) social comparisons with others may result in feelings of relative deprivation that foster collective action. Group-based emotions resulting from perceived injustice, such as anger, are thought to motivate collective action in an attempt to rectify the state of unfair deprivation.<ref name="van Zomeren, Postmes, & Spears (2008)"/> The extent to which individuals respond to this deprivation involves several different factors and varies from extremely high to extremely low across different settings.<ref>{{cite journal|last1=Ostrom|first1=Elinor|title=Collective Action and the Evolution of Social Norms|journal=The Journal of Economic Perspectives|volume=14|issue=3|pages=137–158|doi=10.1257/jep.14.3.137|year=2000|url=http://dlc.dlib.indiana.edu/dlc/bitstream/handle/10535/5683/Collective%20action%20and%20the%20evolution%20of%20social%20norms.pdf?sequence=1&isAllowed=y|hdl=10535/5683|hdl-access=free}}</ref>  Meta-analysis results confirm that effects of injustice causally predict collective action, highlighting the theoretical importance of this variable.<ref name="van Zomeren, Postmes, & Spears (2008)"/>