The Indian sub-continent though protected by various natural barriers like the mountains of north and the vast ocean on the east, west and south. Still its very much vulnerable to foreign invasion.
Explanation:
No. 1 . The tragic natural surroundings of the sub-continent could hardly act as a barrier to various foreign invasion.
No. 2. The snow capped Himalayas in the North and the dense tropical jungles on the east could act as a natural barrier. The vast western desert in the west and its southern feet are washed with three sea's.
No.3. India was said to be, one the wealthiest places on earth. However, it was looted by various invaders.
No.4. Though it is said that it was enriched culturally, however its social fabric was torn apart. It led to a lot of destruction on its wealth, people and her environment.