Forbe's magazine calculates global power based on: Power over many people,control over financial and other valuable resources, power in multiple spheres or arenas and active use of power.

The #1 most powerful person in the world is United States of America President Barack Obama. Bill Gates ranking #4 and the highest ranked business person on the list. Facebook CEO Mark Zuckerberg came in at #25. New York City Mayor Michael Bloomberg came in at #16. Read the full Forbe's Most Powerful People list.