“As Adolf Berle, a fellow cold warrior, once remarked, 'Being vindicated by history is cold comfort.' For one thing, the political scars of those with whom one has polemicized seem more long-lasting and painful than their memories of the political issues that gave rise to them. And yet indifference to the political life of one's times I deem a flagrant expression of moral irresponsibility. Those who profess such indifference owe the intellectual and cultural freedoms in which they luxuriate to the commitment and sacrifices of others.”