In politics, religion and other areas of culture, people disagree on the worth of competing ideas. There is no equivalent to the scientific method that can determine in a robust way which ideas match the real world, and which ones can be ruled out. So conflicting ideologies persist indefinitely.

Elections, for their part, are typically popularity contests rather than measures of candidates' relative competency or effectiveness. Imagine if scientific truth were determined according to which scientist was most popular. To be successful, scientists would have to be charismatic and attractive - and human knowledge would suffer terribly.

Economists want their discipline to be a science, and they have nailed down a few precepts, but many of their debates are still clouded by ideology.

Nathan Myhrvold Quotes