The Tamil parts of Sri Lanka, should be invited to join India as a new state- the Tamils there will have their new state, their autonomy, join in Indian economic success etc. We will have an extension in our territory and more control of our southern borders. I.e somthing like what the European Union is doing. First, they will need to meet certain criteria, like democracic elected government, a certain level of security etc. One idea on how to solve this.