Arnold Kling, at TCSDaily, explains why truth plays so small a role in the public dialogue and the democratic process.
I am going to suggest that democratic politics is a very poor information-processing mechanism. The great mass of people form their political beliefs with little regard for facts or logic. However, the elites also have a strategy for avoiding truth. Elites form their political beliefs dogmatically, using their cleverness to organize facts to fit preconceived prejudices. The masses’ strategy for avoiding truth is to make a low investment in understanding; the elites’ strategy is to make a large investment in selectively choosing which facts and arguments to emphasize or ignore.