The countries which face the challenges of expansion are USA and India because they have a large population and several states and social groups. India has managed to tackle the problem of expansion by providing seats in jobs and educational institutions for Scheduled Castes(SC) and Scheduled Tribes(ST), reserving seats for women in the Parliament by passing a bill in the Rajya Sabha, adopting principles of federalism in democracy, protection of rights of minority groups through Fundamental Rights etc.