Like John Locke, whom he openly admired, Voltaire believed that the purpose of government was to protect the liberties of the people. Religious liberty, freedom of the press, and the abolition of feudal privileges were all cornerstones of Voltaire's political thought. Like many other Enlightenment philosophes, Voltaire also argued that government should facilitate economic activity with as few constraints as possible. In his series of essays entitled Philosophical Letters, he pointed to the mixed model of government in England as the ideal form of government to protect the liberties of the people and promote commerce and economic exchange. But it should be noted that Voltaire was not a believer in republics, and he deeply distrusted the will of the people. England's government was ideal inasmuch as it was a constitutional monarchy, one which balanced out the voice of the people with more learned political opinions. In fact, while Voltaire was not highly regarded in the French court, he corresponded with would-be absolutist monarchs (most famously Catherine the Great) throughout Europe. The role of government was to protect liberty, not to promote democracy.