In 1990, Vaclav Havel addressed a joint session of the United States Congress. It was a heady moment in many ways. Not only was his rise the product of stunning—and surprisingly peaceful—political change; not only was he a living symbol of principled political opposition and its force; Havel was also something extremely unusual: a true intellectual who had just entered the halls of power. And he quickly showed that in his visit to the halls of Congress. The new Czech president was not content to give a mere policy address or a string of bromides and platitudes. Instead he actually talked somewhat serious philosophy to the assembled legislators. Before doing so, he did at least promise, he said, to “limit myself to a single idea.” He called that idea “a great certainty.” What was it? “Consciousness precedes Being, not the other way around, as Marxists claim.”