Based on the text Leading Change" by John P. Kotter

Chapters 10 Anchoring New Approaches in the Culture Few outcomes are worse for an organization than devoting significant resources and time to an institutional change effort only to have the enterprise revert to its old way of doing things. These outcomes hurt employee morale and breed cynicism. It also makes employees and lower level managers less committed to the next great organizational initiative that senior leadership wants to sponsor. The failure to implement lasting change frequently occurs because senior leaders underestimate the difficulty of changing an organizations culture. As anyone knows who has lived through a merger,

Explain the primary reasons culture is powerful. Apply this reasoning to your current or past organization.