Collectivization in the Soviet Union was a process that the government carried out to bring farms, businesses, and people together so that resources could be shared more effectively. It meant making people work together as a group, rather than having many small, independent farms and businesses. It also meant that the government owned a lot of the resources, like land, factories, and money, and that it made decisions about how to best use those resources. In the Soviet Union, collectivization happened in the 1930s, and it was controversial because it meant a big change in the way people worked, and some people didn't agree with the government's decisions.