How is social change affected?

We all have epistemological, experiential, communicative, or political assumptions. Are Tyack & Cuban saying that when a disruption occurs in one of these assumptions, then a
crisis in our belief systems causes disequilibrium which in turn affects social
change in the public educational system? Disagree or agree?

The musings continue ....

I urge you all to thoughtfully listen to Steve Hargadon’s Keynote for the reform symposium virtual conference last July while you consider the disruptions that have occurred in our epistemological, experiential,
communicative, and political assumptions.  His keynote is 
at -> http://reformsymposium.com/blog/2010/07/27/opening-keynote-steve-ha...

I found examples of disruptions in all these assumptions that Steve gave in his keynote. Which ones resonate with you?

Hargadon, S. (2010). Opening keynote. Proceedings of the Reform Symposium, http://reformsymposium.com/blog/2010/07/27/opening-keynote-steve-ha...

Tyack, D., & Cuban, L. (1995). Tinkering toward utopia. Cambridge, MA: Harvard University Press.