From the introduction:
Humanity finally entered in the age of colonization of the planets. Hundreds of worlds are now owned by large colonizing corporations.
Some of these planets are only used for resource extraction to attend to luxuries of those who can pay for it.
The human race is also different, it surpassed the need for food, which was replaced by an implanted battery in every person that converts sunlight captured by the skin in the energy necessary for maintaining their bodies and cybernetic implants.