All websites mentioned in this section were last accessed on 7 March 2009.

The internet is constantly changing and evolving. It is likely that some sites mentioned here will no longer exist by the time you try them: others will certainly have started. Not only do sites appear and disappear: the content of those sites that remain can change, and sometimes drastically so. What was, at one time, a good site might later become worthless. For this reason, some websites archive their entries, so that, even if the site is changed at a later date, the site as it was when you accessed it is available online permanently. For example, the Stanford Encyclopedia of Philosophy, see below, does this. When using the internet, it is always important to use your discretion

and judgement: not everything you read on the internet is true or reliable (nor, of course, is everything you read in a book). The first place many will turn to is Wikipedia, but caution should be exercised. Wikipedia is an amazing resource which has great advantages combined with many drawbacks, both the advantages and the drawbacks arising from the way in which entries can be posted and changed. It has entries for a vast number of different philosophers and topics in philosophy. These vary in quality. Many are very good, but sometimes, inevitably in an enterprise as large and open as this, there are errors or distortions.