Answer :
The people of the subcontinent.
Explanation :
As it is a known fact that after China the most densely populated country in the world is India. Also, pertaining to the history of the once Greater India (Pakistan and India), it is certain that when it comes to preserving culture and fighting battles, the people of subcontinent have left no stone unturned. Culture as old as 5,000 years is still being practiced today in various parts of the subcontinent and not just Pakistan and India. In testing times and when required, the people of subcontinent have protected their homeland from internal and external threats the proof of which can be seen in the various wars fought between the Pakistan and India. Most of the world's labour class these days are people from the subcontinent which is further proof of the fact that the people of the subcontinent are hardworking and loyal to their work.