Alpha Centauri has five habitable worlds, and by 2120 we had outposts or full colonies on every single one.  We targeted New Earth, the most Earthlike of them, with two major colonies from China and the Western Alliance, and numerous smaller countries supported the colony missions in exchange for their own small holdings.  Some failed, but most thrived by cooperating with their neighbors, no matter what country they came from.  Our governments didn’t plan that.