<p>There are no conservative Ivy League universities - if you are implying that by 'conservative' you mean that the schools lean toward that political persuasion. The vast majority of Ivy League students espouse liberal views, and most professors and administrators do as well. This is really a perceived quality. </p>
<p>Many people believe universities like Brown, Yale, and Columbia are liberal because of the history and popularity of student political activism, as well as unconventional and controversial activities on their campuses. A few professors at these schools are famous for being outspoken about their political views. </p>
<p>On the other hand, Princeton (as well as the other Ivy League universities) does not have a tradition of student activism, with the notable exception being the 'Filibuster Frist' campaign. This does not mean that Princeton students are not vocal; they prefer traditional channels (publications, clubs, symposia, etc). Also, Princeton's administration does not tolerate offensive material or controversy in events that take place on campus, and generally students are not ostracized by their peers for having differing points of view.</p>