I really like this idea and it seems very much like the style of this website to try to create an overview of all human thought so far.
One thing I would love to see is what empirical claims are made by each of these thinkers and how well those hold up in history.
There are many competing theories of how society does and should function, from Karl Marx and Adam Smith to Steven Pinker and Eliezer Yudkowsky. These theories are often hard to understand - you may need to read an entire book (or dozens of articles) to feel like you get the key claims of a single theory. At Clearer Thinking, we just launched a new tool called Society Explained to make understanding key ideas from these theories much faster and easier.
The way it works is that you simply pick from over 100 thinkers, and then get to see the key causal claims that they are making laid out in a visual diagram format, with explanations alongside that make it easy to understand what the key elements are and how they connect together. If you're curious to try it, click here (it's free).