I pulled the terms liberal and radical from their 17th and 18th century usage. Radical means essentially a democrat, supporting social equality. Liberal might make more sense as a term conveying a moderate libertarian direction focusing on human freedom including free markets. Capitalist and socialist should be fairly clear despite the constant ongoing struggle over the terms. Capitalist means laissez-faire, markets, profit, private property, and investment capital. Socialist means opposition to laissez-faire markets, planned economy, economic equity, and perhaps even abolition of markets, profit, wealth and private property. Conservative means supporting social hierarchy, the opposite of social equality, and the structures and institutions that sometimes may entail. Populist means supporting community sovereignty rather than the individual autonomy of liberalism.