A 2026 meta-analysis of 5,651 leaders found leadership effectiveness in change is highly context-dependent — generic change leadership models consistently underperform against diagnosed, context-specific approaches.

Four converging bodies of evidence, from a 116-study systematic review to Gallup’s 2026 State of the Global Workplace report, tell L&D leaders the same thing: individual leadership capability is necessary but not sufficient. This article makes the evidence-based case for multi-level leadership development and shows, using the freshest and most expensive proof point yet, a 95% failure rate on enterprise AI investment, exactly where the next leadership budget needs to go.