Nature of complex systems Concepts sharp-end vs. blunt-end practitioner actions as gambles coping with complexity robust yet fragile drift strange loops dark debt well-adapted, under-adapted, over-adapted decompensation, working at cross-purposes, getting stuck in outdated behaviors Readings How complex systems fail Basic Patterns in How Adaptive Systems Fail STELLA: Report from the SNAFUcatchers Workshop on Coping with Complexity Highly Optimized Tolerance: Robustness and Design in Complex Systems Drift into failure