The reason why manuscripts were so expensive in the early fifteenth century is because the printing press wasn't invented until 1440, meaning that every individual script had to be written by hand.
B. Over time, species became better adapted to their environment.
Previous military policies had created massive killings throughout long years on a war of aggression. Brinkmanship, as showed in history was used to let another country stop its war through massive retaliation. It is a more dangerous option to use nuclear weapons as a sign of power and capability to kill more people including civilians in a fast mode.
