What are the motifs in Red Mars by Kim Stanley Robinson?

The motif of medical advancements, and their effects on the live population of planets, is examined in the novel as well. First, on a more minor note, Vlad and his medical team invent a new drug that simulates the natural endorphins and opiates in the human brain, creating the feel good drug. John, for one, becomes addicted to this drug, as he becomes unable to exist in his famous position in society without the drug to calm him and make him happy enough to be able to fake his emotions. Such a drug, then, is clearly a danger in the novel as it allows John and others to slip into a mood that they really do not feel. While it may be natural, its effects are still addicting.