November 21 is the 62nd monthly meeting for Systems Thinking Ontario. The registration is on Eventbrite.

Wicked Problems, Systems Approach, Pattern Language

At U.C. Berkeley in the 1960s, Horst Rittel (originator of "Wicked Problems"), C. West Churchman (luminary in the Systems Approach) and Christopher Alexander (leading Pattern Language) led graduate programs. Doctoral students flowed across departments to their seminars and workshops.

Many of those alumni are the core of the PUARL (Portland Urban Architecture Research Laboratory) and Purplsoc (Pursuit of Pattern Languages for Social Change) communities.

David Ing led workshops at the Purplsoc conference in October 2017, and PUARL conference in October 2018, with the aim of regenerating some of the ties that were lost in the 1970s.

Come participate in an informal, unrehearsed conversation about commonalities and distinctions across these three bodies of work. In the interest of open communications, the conversation will not be recorded, and the Chatham House rule will apply.

David Ing is a systems change researcher, and one of the cofounders of Systems Thinking Ontario. He is a past-president (2011-2012) of the International Society for the Systems Sciences.


  • Climate Ventures, Centre for Social Innovation, 192 Spadina Avenue, Suite 216, 6:30pm to 8:15pm
  • If you're running late, the front door may require key fob access. Do you have David Ing's mobile phone number?

Suggested pre-reading:

David will refer to the following artifacts:


Post-meeting artifacts

Bloggers are encouraged to write about their learning and experiences at the meeting. Links will be added to this page.