In general, grievance (from class. lat. gravis – heavy) is a wrong or hardship suffered, whether real or supposed, which forms legitimate grounds of complaint. In the past, the word meant oppressive state of things.
History and politics 
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A grievance arising from injustice or tyranny can be cause for rebellion or revolution.
The revolt of English barons in the early thirteenth century which led to the Magna Carta of 1215 was partly motivated by grievances against abuses by King John. This right to Petition the king, for grievances, was affirmed in the Bill of Rights 1689
The United States Declaration of Independence is mainly an enumeration of the colonists' grievances against King George III. The right "to petition the Government for a redress of grievances" is recognized in the First Amendment to the United States Constitution.
- ^ Oxford English Dictionary