The essay, “Considerlation on the Upper-left Quadrant of Ken Wilber’s Four Quadrants Theory”, was placed in the site INTEGRALWORLD .
Webmaster of INTEGRALWORLD is Frank Visser. He is Author of “Ken Wilber: Thought as Passion” (SUNY 2003). The site is an independent forum for a critical discussion of the integral philosophy of Ken Wilber. There are so many interesting essays. I recommend you to look into the site.