The climate policy debate has been raging for nearly three decades with no end in sight. Why is it so intractable? Part of the answer is that it's not just a debate over a narrow policy question; it is, at root, a debate over two competing ideologies: one that upholds reason, egoism, individualism and capitalism versus one that upholds authoritarianism, sacrifice, collectivism and statism. This talk explores the ideological character of the climate debate and its implications.