The topic of Systems Thinking and Managing in the Context of VUCA (volatility, uncertainty, complexity and ambiguity). is deep and wide, and overlaps with pretty much every other consultancy discipline.
Some basic, classic texts – fundamentals that underpin subsequent 21st century research and practice - are a good place to start:
And – anything written by Mee Yan Cheung Judge. (for example – Organization Development – Cheung Judge and Holbeche, 2015).