Question

who is the father of human development index (HDI)​

Answer 1

It was developed by Indian Nobel prize winner Amartya Sen and Pakistani economist Mahbub ul Haq, with help from Gustav Ranis of Yale University and Lord Meghnad Desai of the London School of Economics, and was further used to measure a country's development by the United Nations Development Program (UNDP)'s

Answer 2

$\bold{Mahbub\: ul\: Haq}$