India, April 14 -- Basic human nature has not changed over the thousands of years that mankind has inhabited this planet. What has kept changing is its mode of expression. The primitive man first fought with bare hands, then with clubs, which was followed by sharp weapons like the spear and then came the catapult and the propulsion of stones. Firepower entered the scene and in came ammunition. Gradually, warfare moved from the land and sea to include the sky. The methods and the levels kept changing but the basics were the same. Typically, the methods of cooking and living changed, too. Distances shrank and time multiplied with the use of technology. Yet, basic emotions remained constant. The tribal world is a good example globally, of no...