From the 1790s to the 1820s, British radicals concentrated on parliamentary and electoral reform, emphasising natural rights and popular sovereignty. Richard Price and Joseph Priestley adapted the language of Locke to the ideology of radicalism. The radicals saw parliamentary reform as a first step toward dealing with their many grievances, including the treatment of Protestant Dissenters, the slave trade, high prices, and high taxes. There was greater unity among classical liberals than there had been among Whigs. Classical liberals were committed to individualism, liberty, and equal rights. They believed these goals required a free economy with minimal government interference. Some elements of Whiggery were uncomfortable with the commercial nature of classical liberalism. These elements became associated with conservatism.