It was during his reign that Mali first began to become an economic power, a trend continued by his successors an improved on thanks to the ground work set by Sundiata, who controlled the region's trade routes and gold fields. The social and political constitution of Mali were first being codified during the reign of Mansa Sundiata Keita. Known as the Gbara and the Kouroukan Fouga, although not written and even subject to alterations in retelling and when they were first recorded in written form, they were part of the social and political norms of Mali. Many of these laws have been incorporated into the constitution of modern-day Mali.