Why India would not invade other countries ?

Why India would not invade other countries ?
Why other countries did  not invade India till as late as Moguls ? 

Genghis Khan! Just why would history’s foremost looter, invader, pillager spare India?

When Genghis Khan’s Mongol armies were running rampant, Islamic refugees found shelter in India, during the reign of Iltutmish. In 1221, Khwarezm-Shah and other Persian refugees, sought refuge in India, across the Indus into the Punjab, India, from Genghis Khan’s Mongol armies ?

History of  India was not kept properly by westerners. It is a long history of India which was intertwined with its spiritual pursuit which kept some records in puranas. But we have to understand political structure as well as spiritual beliefs which kept India not only invincible but also not eyeing outside India for occupation. 

Past : 

Let us start with one of the famous Kings of India Sri Ram who has gone as far as Sri lanka to conquer Ravana. After defeating Ravana, Sri Ram gave the kingdom to Ravana's brother Vibhishan and returning to his country. he did the same after defeating Vali and gave the kingdom to Vali's  brother Sugriva.  That is the tradition of India not occupying other countries. 

Additionally India was most advanced and rich country in the world,  and hence there was no point in invading poorer countries and places where rivers and fertile land is not present. British wanted to visit India as it was richest country at that time. Columbus instead of reaching India reached America and called it India and and named the residents as Indians.  As chinese Mao Tse tung said" India without moving an inch, invaded china and dominated their culture for hundreds of years. so is south east Asian countries,
Indonesia, Vietnam and Malaysia. 

 Present : 

India defeated Pakistan and occupied present bangladesh, but never occupied it for long and helped them declare independence .

so the orri and  Poonch which then Indian Prime Minister gave back to Pakistan. Even Kashmir's King agreed to join India than Pakistan . However, India always kept their special status though it was part of India as per constitution. This can be compared with hina who occupied Tibet which  has historically connected to India and India never occupied it though all the Himalayan kingdoms like Bhutan, Nepal are dependent on India not only for economics but also for military suport. India never occupied these buffer countries which are not even a fraction of smallest state of India.