Historians give John Pym due credit as a successful Parliamentarian; rhetorical critics examine Pym's prowess as an orator. Both perspectives focus on Pym's management of issues of the day and do not account for his masterful appropriation of political language. We conduct an ideographic analysis of twelve of his addresses to Parliament between 1640 and 1643. His discourse reveals a crucial reformulation of <law> in relation to subsidiary ideographs, including <religion>, <justice>, and <Parliamentary privilege>. These ideological innovations were instrumental in building Parliamentary opposition to Charles I and allowed for advances in democratic ideas made manifest in Anglo-American liberalism.