The relationships and mindset essential for a strong, successful, progressive, and high-performing Agile organization  are the the exact same qualities Drucker encourages in The Effective Executive. 

The best way to support a meaningful value stream in a modern organization is to move from top-down boss-helper to bottom-up team-roles where the effective executive functions as a coach and advocate, not as a boss and commander.

This episode is also available as a blog post: http://plumedepoison.com/2021/04/22/the-effective-agile-executive/