"World" is such an arbitrary term. For example, 90% of the people who call Arjit Singh as the greatest singer of the world knows: - 50+ contemporary Indian singers - 20+ international musicians - 10+ music composers - 5+ bands - 3+ countries' music - 1 type of music taste They haven't even heard Papon's 'Khumaar'. This constitutes "world" to them. Such arbitrary term this "world" is!