What are the objectives and philosophy of doctrinal research? What are the objectives and philosophy of socio-legal research? Are these research types mutually exclusive?

Legal Research Skills and Methods

The objective and philosophy of doctrinal researcher has to be the same as that of sociological jurisprudence, that is, social engineering through law.”
Consider questions such as:
What are the objectives and philosophy of doctrinal research?
What are the objectives and philosophy of socio-legal research?
Are these research types mutually exclusive?
What is the primary use of doctrinal legal research as regards social engineering ?
Is social engineering the most important function of legal research?