After advent of Kalki Avatar the geographical position of Indian peninsula is going to change. India will become greater India. Even the name of the country would change back to Bharatvarsha. The greater India would include Pakistan, Afghanistan, Tibet, Nepal, Myanmar, Bangladesh and Sri Lanka, Maldives etc. The combined population would exceed 1600 million people.
The aftermath of world war 3 would announce a great victory for mankind. For the people, of the people and by the people would no longer remain only a slogan. It would be effectively implemented by Kalki Avatar. Already the largest democracy of the world, India would prove to mankind that the jnana wisdom contained in Bhagavad Gita and Upanishads (independent spiritual treatises) was the only path towards gaining enlightenment followed by moksha salvation.
Kalki Avatar would shortly develop a dedicated following of 2000 million people. As detailed in Bhagavad Gita to pursue path of spirituality one can continue following ones religion, faith or belief. Similarly Kalki Avatar would not impose Hinduism on anyone. It is up to free will of the people of the country to convert to Hinduism or not. Even for following Indian scriptures, jnana wisdom contained in Bhagavad Gita one need not convert to Hinduism religion ever.
The philosophy of conversion belonged to those with lowly thinking. The workings of Kalki Avatar would always remain universal in nature, applicable to every single country nigh the entire world.
The presence of Kalki Avatar on mother earth is for one single reason, re-establishing Dharma (righteousness) against evil forces of adharma (lawlessness) at all costs. Once this is done the second task would be to give back to community whatever he learnt on spiritual path. The wisdom of Bhagavad Gita and Upanishads would freely become available to entire mankind in their own simple language, dialect easy to understand, palatable by all.
Kalki Avatar though belonging to India and follower of Hinduism would be a universal figure loved by all. For Kalki Avatar the whole world would always remain one large family.