After the Crisis: The Nature of a Global Pivot

My comment on Parker's book will focus on what it tells us -- and what questions it fails to answer -- about the character of turning points in world history.  I will discuss the ways in which elements of the crisis described by Parker might be regarded as prompting widespread political and institutional change not during the crisis period but in the decades following.  Is this combination of crisis and global political shift generalizable?  In what ways does Parker's approach suggest or question common approaches to periodization in world history?