This important work appeared fifteen years after Sidney's execution for treason in 1683. A reply to Filmer's Patriarcha, the Discourses is one of the earliest modern statements of republican ideals. He proposes a doctrine of natural justice and governmental order from which all institutions vary at their peril. More important, Sidney asserts that a king's authority is granted by parliament, which has the additional power to depose him, indeed a controversial idea during the Restoration period.
