Europe is in, well, Europe. Some countries it contains are: Germany, Italy, France, Spain, Great Britain, Sweden, Finland, Poland, Norway, Denmark, and Switzerland.
There are lots of human systems in Europe! One of them is catholicism. It is governed by a pope. Another is the European Union. It includes all of the further west countries. And did you know that most European countries use an economic system called "the euro"?
example: When the Europeans first moved to New Zealand, they burned the lowlands and prepared them for farming, brought many new plants, animals, diseases, and parasites, and when they had prepared it enough, the total forest cover of the land went down to 24.6%! And during this time, they had logged the land, too. However, they changed the land's stability, remaining forests, and also the animal diversity.