In my early days of reflecting on the nature of networks I speculated that as people work more and more in networks that leadership would become less important. Fortunately, I have recovered from that naive notion. Today, experience has shown me that for networks and collaborative work to succeed, leadership is actually more important than ever. I have seen great collaboration efforts and thriving networks literally killed off by the wrong kind of leadership.
Leadership can be considered as an emergent behavior that arises out of a particular shared social reality. The qualities that are important to a leader are dependent upon the conditions in which that leader is operating and the other roles that people play in that particular culture, society, network, or organization. At a very fundamental level the leader does not define and create their role. The role of the leader is defined and validated by the group - that then accepts or rejects individuals as candidates for that role.
In most value networks and collaborative work there is no actual role of "leader." The accountability in networks and most truly collaborative work happens peer-to-peer, not upwards. Rather, the specific contributing roles played by a group leader are defined instead. Such a role might be "Resource Provider" or "Executive Team Liaison" or "Advisor." This can be a very big adjustment for leaders and even for those within the group who have been conditioned to put the leader's priorities above those of other roles in the network.
In networks and strongly collaborative environments, leaders and managers are well advised to focus on two things 1) their own direct contributing roles within the work activity and 2) the conditions that allow the network to thrive.