The Arthashastra, probably compiled around 100 AD , and the Manusmriti (c. 100–300 AD) were foundational treatises in India, and comprise texts considered authoritative legal guidance. Manu’s central philosophy was tolerance and pluralism, and was cited across Southeast Asia. During the Muslim conquests in the Indian subcontinent, sharia was established by the Muslim sultanates and empires, most notably Mughal Empire’s Fatawa-e-Alamgiri, compiled by emperor Aurangzeb and various scholars of Islam. In India, the Hindu legal tradition, along with Islamic law, were both supplanted by common law when India became part of the British Empire. Malaysia, Brunei, Singapore and Hong Kong also adopted the common law system. The eastern Asia legal tradition reflects a unique blend of secular and religious influences.
Over time, courts of equity developed solid principles, especially under Lord Eldon. In the 19th century in England, and in 1937 in the U.S., the two systems were merged. The …