Strategy implementation ultimately comes down to what people do and do not do. Effective implementation must tap into human motivations and align these motivations behind the strategy. While everyone may not agree wholly with all elements of a strategy, positive incentives such as monetary, career, and social incentives overcome 'change resistance.' According to Thompson et al., (2022, p. 342), an effectively designed incentive and reward structure is the single most powerful tool management has for mobilizing employee commitment to successful strategy execution." What are some reasons that strategies fail? can you give sources and references