The twentieth century has seen the immensely important impact of four institutions on making social change and development in various societies of the world. They are: 1) Nation States; 2) International Organizations; 3) Multi-national Corporations and 4) the NGOs. The role and scope of the NGOs have expanded tremendously during the recent decades, especially in the fields of emergency humanitarian aid and social development.
By some estimates, there are as many as 20 million NGOs working around the globe.