Iain M. Banks - The State Of The Art (Culture #4)

The State Of The Art (Culture #4)
A short story collection. Two of the works are explicitly set in the Culture universe ("The State of the Art" and "A Gift from the Culture"), with a third work ("Descendant") possibly set in the Culture universe. In the title novella, the Mind in charge of an expedition to Earth decides not to make contact or intervene in any way, but instead to use Earth as a control group in the Culture's long-term comparison of intervention and non-interference.