The emerald tablets have the combined wisdom and knowledge of the other members of the council of 13. 

Seshat also contributed to the tablets. 

She understood that a civilization ignorant of the truth and especially of its own history becomes stagnant and easily programmed and manipulated. 

Her knowledge helped countless civilizations build libraries and records of their own species and the truth of the cosmos so their descendants can understand who they are and the history of their people. 

This is how civilizations remain in alignment with their source and evolve organically.