Geshe Kelsang Gyatso was a Buddhist monk, meditation teacher, scholar, and author. He was the founder and spiritual director of the New Kadampa Tradition-International Kadampa Buddhist Union (NKT-IKBU), a registered non-profit, modern Buddhist organization that came out of the Gelugpa school/lineage. They have 1,300 centres around the world, including temples, city temples and retreat centres that offer an accessible approach to ancient wisdom.

The New Kadampa Tradition – International Kadampa Buddhist Union (NKT—IKBU) is a global Buddhist new religious movement founded by Kelsang Gyatso in England in 1991. In 2003 the words "International Kadampa Buddhist Union" (IKBU) were added to the original name "New Kadampa Tradition". The NKT-IKBU is an international organisation registered in England as a charitable, or non-profit, company. It currently lists more than 200 centres and around 900 branch classes/study groups in 40 countries. The BBC describe the New Kadampa Tradition as "one of the major Buddhist schools in the UK, founded by the Tibetan-born Geshe Kelsang Gyatso."