This team of two is the social core of the larger herd and initiates for each individual horse the herd instincts required for survival. The horse herd is a brilliantly organized team where each member has a well defined place, each accepting their assigned position because they know they will only survive as individuals if the team survives.
Human beings are poverty conscious. They tend to see other members of the tribe as a threat to their survival rather than each making a unique contribution to the survival of the whole tribe and therefore its individual members. For this reason we lack the instinctive ability of the equine species to:
Focus on a common goal;
Accept a unique role after an accurate appraisal of differing abilities;
Identify the enemy outside the team rather than the enemies within;
Dedicate ourselves to the common good;
Move as a graceful unit rather than as a resistant group of poverty conscious individuals.
Human beings are not instinctively team members, but can be taught to leverage the power of nature's most efficient team, a herd of horses on the run.