An early problem in agricultural societies was

The Neolithic is the most important period in history and one of the most unknown by the general public. With the adoption of livestock and agriculture the first cities were created, the aristocracy, the division of powers, war, property, writing, population growth were born. In short, the pillars of the world in which we live arose, great problems for humanity were also born.

The constant and out of control demographic growth caused human concentrations, social tensions, wars, growing inequalities, and above all, I created new diseases that could not be faced by humans.

acid rain is the answer

. austria-hungary began seizing british colonies in africa.