Ken Griesi and Beryl Bellman: The need for enterprises to efficiently and effectively deal with complexity and change has, perhaps, never been more prevalent than now.? Driving relevant and timely solutions for an enterprise demands a thorough understanding of the problem space and skillful bounding of the solution space prior to engineering a solution. Yet even as EAs faces these challenges, there are lessons to be learned from natural systems and an examination of CAS Theory. EA 3.0 stands upon the strong and steady shoulders of well-established principles that have survived the test of time. As John Zachman (2003) states, Seven thousand years of human history would establish that the key to complexity and change is architecture.