This is a poster I created based on a book cover by Brad Reynolds on Ken Wilber many years ago. The word "Liberation" to me is more important than any other descriptor you could give to Wilber's work (most of which pale in comparison and strength)... and, Wilber's latest book "The Religion of Tomorrow" (2017) utilizes these four conceptual foundations for domains of human experience on the path of Liberation... a far and above improvement, in my view, of "liberation" paths presented prior in human history. Why? Because it is "integral" as no other models/theories/practices are.
You will notice the "Clean Up" (orange font) is my favorite, of which all my Fear and Fearlessness work is dedicated; but for sure, I in no way deny the importance of the other three because they are all interdependent for effectiveness--, for detailed descriptions you simply ought to read Wilber's original work in his latest book or on the Internet, wherever... because they are clever metaphors and a simple way to remember the liberation work required by us all who are able and willing to participate ...
p.s. my 'corrective' to the four Domains (and bias) of Wilber's is that they ought to be 'balanced' better and less following Wilber's tendency to "ascend" (Up, Up, Up, Up)... and, keep fully integrative in language/discourse/imaginary so that we would have also "Wake Down," "Show Down," "Grow Down," and "Clean Down"...