I separate all knowledge into 27 core domains, and for each domain of knowledge , I link to wikipedia books I made ; each wiki-book provides an A-Z of all the core 'deep' concepts in that domain. On average each domain needed around 75 concepts (or 75 wiki articles) to fully summarize.

Note: I was aiming to provide a 'summary' or 'over-view' of explanatory knowlegde in each domain , so I capped the number of wikipedia articles linked at a maximum of 150 per domain (av. is 75 or so). Obviously the idea is that to follow up something in great depth, you need to follow up links and references that appear on the wikipedia pages to 'drill down' into more detail.

Now my classification system works like this:

Left-hand column is all the mathematics domains
Middle column is all the physical science domains
Right-hand column is all the cognitive/social sciences.

If you want to learn philosophy, it's generally the knowledge domains down that right-hand column you want to look at (cognitive/social science). But understand that all knowledge is an interconnected whole - philosophy can only really be effective when it builds on a foundation of empirical knowledge first.

Trust me on this. I have thought about this for years. And there is a very big purpose behind my classification scheme which I can't talk about here. Lets just say the way my map of knowledge is arranged exhibits a 'grand pattern' - a 'deep secret language' if you like I'm not just being metaphorical here. Let me just say that reality really is a language - a language of thought.

I gaurantee you that reading the entire A-Z list of wiki-pages for each knowledge domain is SUPER effective - you will have never exxperienced anything like this before.

Think of this as a 'crash course' in the deep structure of reality. This is like being hit by a nuclear blast of knowledge - it could change your entire world-view if you can but grasp the secret

The beginning of infinity awaits...