I’ve watched too many leaders shield themselves from task conflict. As they gain power, they tune out boat-rockers and listen to bootlickers. They become politicians, surrounding themselves with agreeable yes-men and becoming more susceptible to seduction by sycophants. Research reveals that when their firms perform poorly, CEOs who indulge flattery and conformity become overconfident. They stick to their existing strategic plans instead of changing course—which sets them on a collision course with failure.

