Leading in Complexity

During a lifetime of leadership we will each encounter a few especially complex challenges, and our formal leadership training (if we’ve had any) will probably not have equipped us for these.  What makes some situations inherently complex?  How do we make sense of what’s happening in the midst of that complexity?  How might our leadership approach need to adapt at these times?  And what principles and tools might help us to navigate the complexity with wisdom, grace, and integrity?