The closest humans have come to a hive mind is the experience known as “group flow,” the shared, collective version of a flow state. Group flow is a team performing at its very best: an incredible brainstorming session, a fantastic fourth-quarter comeback, a band coming together and blowing the roof off the auditorium. It’s also considered the most pleasurable state on Earth. When psychologists ask people to rank their favorite experiences, group flow always tops that list.