They decided to bring wolves back in many States. Wisconsin is one of them. Wolves were hunted here well into the 1960s when the same license that allowed a hunter to shoot a deer also allowed shooting wolves. There was a bounty on wolves until 1957. When the DNR decided to bring back wolves, the theory was that wolves would help control the deer herd as there were many deer vs car collisions. Wolves are smart. Why would they try to chase down deer when there are domestic animals that are much slower and are fenced in making them much easier prey.
Wolves would be a much better way to control the deer herd as they cull out the slower weaker animals. Humans are often trophy hunting so the kill they biggest and strongest leaving the smaller weaker animals to breed. As a result, the average size of deer has gotten smaller.
Wolves multiply fairly well. Wisconsin had a wolf hunting season this year. The goal was to kill 119 wolves and they issued 1500 permits. The season was closed after 182 wolves were harvested in the first three days of the season. Only the Alpha wolves breed so non alpha wolves will move on to start a new pack. If the Alpha wolves are killed, there is a struggle within the pack to establish a new Alpha pair.
https://www.outdoorlife.com/story/hunting/wisconsin-wolf-hunt-exceeds-harvest-quota/