100 Years of Existence of the International Union of Pure and Applied Physics, IUPAP

The International Union of Pure and Applied Physics (IUPAP) is the only global International Scientific Union dedicated to physics that connects physicists from all fields and all continents. About to enter its second century of existence, IUPAP reaffirms its defining aims - to foster the development of physics research and education, and to encourage inclusiveness and cooperation between physicists in different countries - expanding them to embrace current challenges and conditions. I will review the origin of the Union, its achievements and how to leverage the Union's unique potential to make meaningful progress in the future.