the year is 2066. Many years since the human race went extinct. a world war caused the humans to kill each other. cats remained by hiding from the fighting and evolved to be the new dominate. other animals like dogs were diminished in numbers because they fought alongside humans. birds, fish, reptiles and rodents remain but did not evolve like cats and dogs. technology never advanced passed the invention of the light bulb and the age of steam continued because humans could not get along to further growth.