Tribalism has always been a defining characteristic of human society, regardless of its progress through the ages and realms of knowledge. We still tend to gather in groups based on certain common characteristics and differentiate ourselves with others who do not share these traits.
The social stigma, similarly, that we attach with the differently-abled is triggered by our deep-seated fear of the other. According to the United Nations, over a billion people form the world’s largest minority — they live with some kind of disability. And India is home to around 70 million of them.
Source : http://www.firstpost.com/living/supreme-court-disabled-persons-jeeja-ghosh-ngo-adapt-2782728.html