Who has propounded the theory that “Industrial Conflict is a part of the broader social conflict between classes and used to explain fundamental historical process of change and development in human society”?

Industrial relations is about the relationship between the administration and the employees of an organization at the workplace. 
Minimum Wages Act, 1948, Factories Act, 1948, Maternity Benefits Act, 1961, Payment of Bonus Act, 1965 are some important labor laws in India.