Question

how Institutions help historians​

Answer 1

Historical institutionalism (HI) is a new institutionalist social science method that uses institutions to find sequences of social, political, economic behavior and change across time. It is a comparative approach to the study of all aspects of human organizations and does so by relying heavily on case studies.

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Answer 2

They  evolved over time and have created and contributed to more effective ways to achieve project or programme goals.