
Consequentially we accepted some kind of leadership whether of a real person or imaginative / invented super being. Normal people were part of a branching scheme of the tree depending on their power or wealth or importance. This concept is in fact such a powerful metaphor for organizing big communities, organizations, countries or super national entities or conveying information to map a variety of systems of knowledge that still persists in our understanding of organizational order.
At the end of the Cold war things somehow started to fall apart. World became globally connected via air transport and mostly due to evolution of Internet. To be precise I think the Internet is actually changing the tree paradigm we lived thousands of years, quite a lot and pretty fast.
Information is not any more spread via top down approach which gave top people the power of it. Organizational schemes are flattening. Even such organizations as armies follow the new principle when teaching combats units how to behave in the battle. It is dealing with decentralized, independent cells, where there's no top leader leading the whole combat process. Rather, any soldier should or could take command if necessity of circumstances requires so.

Even more, this new way of networked thinking is critical to solve many of nowadays’ complex problems we face. From decoding the human genome or brain up to understanding the vast Universe we live in.
Back to the topic in question – is there a space for a leader in such network notions?