Books about the future are always interesting to read in order to reflect on what may await us if we do not take certain actions. Usually we imagine that in many years science and technology will reach a new level, people will become more and more developed both physically and mentally, but Jack London in his novel shows a completely different world in which there is no science, medicine is replaced by quackery, and people become worse and worse, gradually sinking morally. Mockery and ridicule of anyone is now normal entertainment for them, their vocabulary is very limited, and their knowledge is scarce.