System justification is a cognitive bias that occurs when people justify or defend the status quo and existing social, economic, or political systems, even when such systems may be harmful or unjust. This bias can lead people to accept and rationalize inequalities, discrimination, and other forms of social injustice.

System justification bias can manifest in different ways. For example, people may downplay the negative consequences of a particular policy or system, focus on its positive aspects, or blame those who are negatively affected for their own circumstances. This bias can also lead people to resist change and reject alternative solutions that challenge the status quo.

System justification bias can have important implications in various fields including politics, economics, and social justice. It can lead to support for policies that perpetuate inequality and oppression rather than promoting social equality and justice.

It is important to note that system justification bias is not always conscious or deliberate. It can be influenced by various factors including cultural norms, socialization processes, and ideological beliefs.