This document summarizes India's historical contributions to global GDP from 1 AD to 2001 AD. It shows that: 1) In 1 AD, India accounted for 32.9% of world GDP, the highest percentage. This declined over time due to foreign invasions and colonial rule. 2) India again reached a high of 5.4% of world GDP in 2001, showing signs of an economic rise under globalization. 3) Countries like the UK saw their percentage of world GDP peak during their colonial rule over other nations, but then decline as global trade opened up. India is performing well under free trade compared to periods of foreign domination.