From the introduction:
More than a thousand years ago, the Former Empires ruled in glory. Wonders beyond imagining littered the nations of that ancient age, even the least of men and women living with the luxury of a Bright Republic oligarch. Hunger, sickness, ignorance, pain... all the blights to which mortal bodies are heir were banished by the marvels of the Former Empires. The agent of this mercy was the might of theurgy, the terrible High Magic uncovered by restless scholars of the old realms. With the secrets of theurgy at their disposal, sages were able to lay impious hands on the very levers of creation, manipulating cosmic powers far beyond the birthright of mortal humanity. The deep powers of the Creator were at their disposal at last, ready to glorify their kindred and exalt their causes.