Butterfield had to send a clear message about which behaviors were and were not part of the culture. So he began to shift the emphasis away from empathy and toward one of the core attributes he wanted to build into the culture: being collaborative. Then he defined what that value meant in practice. At Slack, “collaborative” means taking leadership from everywhere. Collaborative people know that their success is limited by uncollaborative people, so they are either going to help those people raise their game or they are going to get rid of them.