The first thing a leader can focus on is the act of tightening the tribe. It's tempting to make the tribe bigger, to get more members, to spread the word. This pales, however, when juxtaposed with the effects of a tighter tribe.
A tribe that communicates more quickly, with alacrity and emotion, is a tribe that thrives.
A tighter tribe is one that is more likely to hear its leader, and more likely still to coordinate action and ideas across the members of the tribe.
This tightening can happen without technology, and it can happen when there's no profit motive.