Social Movements are organised group of people having common purpose and work toward a common goal. Social movement are organised or sometimes informal who launch their mode of work toward bringing a social change. A movement of people is always a collective action, it may either work toward bringing a change or resisting a change and they may be organised or non organised having different modes to achieve their aim.
A political party is a group of persons, with common interest and affiliation, with the object of contesting election and gain power to run the government. The vital functions amongst others are to develop policies and facilitate governance and to persuade voters to support them in achievement of their policies, common goal and favourable interest.
Usually interest groups seek to promote
the interests of a particular section or
group of society. Trade unions, business
associations and professional (lawyers,
doctors, teachers, etc.) bodies are some
examples of this type. They are sectional
because they represent a section of
society: workers, employees, businesspersons, industrialists, followers of a
religion, caste group, etc.
Public Interest Groups promote collective
rather than selective good. They aim to
help groups other than their own
members. For example, a group fighting
against bonded labour fights not for itself
but for those who are suffering under
such bondage. In some instances the
members of a public interest group may
undertake activity that benefits them as
well as others too.