What impulses lead us to ask philosophical questions and pursue philosophical enquiry? In a series of stimulating essays fourteen distinguished thinkers examine philosophy and their own engagement with it. Titles such as "How philosophers (who lose their faith) redefine their subject," "Philosophical plumbing," "Putting into order what we already know" and "Is philosophy a 'theory of everything'?" indicate the range of topics and the lively and provocative ways in which they are tackled.