Answer:William the Conqueror's 1066 invasion of England furthered the concept of law in ways still practiced today by introducing the Norman legal system to England[1][2][3]. This system was based on the idea of a centralized monarchy and a strong, uniform legal code, which helped to establish the rule of law and reduce the power of local lords[1][2]. The Norman legal system also introduced the concept of trial by jury, which is still used in many countries today[1][3]. Additionally, the invasion led to the compilation of the Domesday Book, a comprehensive survey of land ownership and taxation that helped to establish a more efficient and equitable system of taxation[1][3].