Philosophy has had many accomplishments, it's where the questions first get asked. In general it's where ideas get refined and understood enough to go out and be acted upon -- before it can be science it needs to through it's philosophical stages. Heidegger, an amazing existentialist, laid out a lot of problems that AI was going to have in the 50s. http://www.amazon.com/What-Computers-Still-Cant-Artificial/d...

The study of philosophy for most undergraduates taking a few classes can be thought of as the history of human thought.