It's excellent that they think of work as what sets us apart from nature. Redefining man as the working animal really puts an interesting spin on what our lives are actually like! It must really change your internal monologue- more of a victimized existence, as the only animal not allowed to play. Or maybe that's just me coming from a culture of play and automatically valuing play as greater than work. I suppose the joy they get from work sustains them. I am surprised by their lack of cultural or spiritual leaders. I wonder what/whom those dances are about?