I agree wholeheartedly that we need to subdivide many of these categories, especially those like Plato and Aristotle that currently contain thousands of entries.  I do think we need to do some careful planning of just how to do this.  Topical subdivisions are one very reasonable idea; it might be useful to have a standardized set of default topics not only for ancient philosophers but for historical figures generally, and some thought needs to go into choosing the best ones (but your suggestions here are very useful).  There are also other changes I think should be made: we need to add named-philosopher categories for some other figures (e.g. Theophrastus), some other groups, etc.  I've been wprking through a large accumulation of uncategorized entries (about 25,000 of them) in the top Ancient Philosophy category for the past month or so, and I have about two thirds of those now reallocated to subcategories (or in many cases to the 'Classics' category: a lot of these are not really philosophy material).  I hope to have that done within a few weeks.  One thing that's emerging from this process is a much better picture of just which categories will be useful.  When I've finished the backlog of categorizations, I will be working on a system of finer-grained categories to propose.  A discussion in this forum of how to do that would be a very great help: so, thanks very much for your suggestions.  Let's keep this thread going.  (Robin Smith, editor of the Ancient Philosophy category)