The significant contribution of empiricism was not the eradication of certainty, but the eradication of infallibility as a criterion of certainty. And this shift from infallibilism to fallibilism has profound consequences not only for toleration, but also for the subordination of faith to reason and theology to philosophy.

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Intellectually, every man is an island unto himself; no man can assume the responsibility of thinking for another. The virtue of rationality thus entails intellectual independence and the willingness to assume responsibility for one’s beliefs, choices, and actions.

We can see why Jefferson focused on inalienable rights in his effort to fasten the charge of tyranny on the British government. The violation of inalienable rights was a defining characteristic of a tyrannical government, and only against such a government is revolution justified.

When conformity is required, as it is in Christianity, what are the results? To begin with, the sacrifice of truth inevitably follows. One can be committed to conformity or one can be committed to truth, but not both. The pursuit of truth requires the unrestricted use of one's mind—the moral freedom to question, to examine evidence, to consider opposing viewpoints, to criticize, to accept as true only that which can be demonstrated—regardless whether one's conclusions conform to a particular creed.

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As Herbert Spencer was to point out in the following century, feudal serfs were required to turn over one-third of their produce to their overlord. This means that any citizen who is required to pay a tax rate greater than one-third is worse off in this respect than the lowly serf.

Reason is not one tool of thought among many, it is the entire toolbox. To advocate that reason be discarded in some circumstances is to advocate that thinking be discarded—which leaves one in the position of attempting to do a job after throwing away the required instrument.

It is clear that 'social Darwinism' and 'survival of the fittest' were intended by Obama to evoke feelings of fear and disgust. It is highly doubtful that Obama knows anything about the history of these ideas, and it is even more doubtful that he cares. A concern for truth is not the coin of the political realm.

Americans feared the Townshend Act for another reason: revenues raised form it were to be used to pay the salaries of colonial governors and judges. This proposal struck at the heart of a revered American tradition. Although the Crown appointed governors in all 11 colonies, their salaries were paid by the colonial legislatures. This ‘power of the purse’ enabled American assemblies to check the power of the governors and judges by withholding their salaries.

The leap of faith is a strategic impasse that confronts every Christian in search of converts; and, as he sees the matter, there is no wrong way to become a Christian. It is the end that is important, not the means; it does not matter why you believe, so long as you believe. For the philosopher, in contrast, the paramount issue is the justification of belief, not the fact of belief itself.

In the late nineteenth century, liberals in Europe and America discovered that they were victims of a linguistic coup. They found that they were no longer regarded as liberals per se but as old liberals – a qualification that had bed foisted upon them by self-proclaimed new liberals.