The findings, published in today's issue of the journal Nature, shed light on the evolutionary advantages of cooperation among animals in the wild, said Brosnan, because they suggest that such behavior can make a group of monkeys more closely knit and better able to avoid predators.

Exact, thr purpose of unions is to avoid predators...

"Dieu se rit des hommes qui se plaignent des conséquences alors qu'ils en chérissent les causes" Jacques-Bénigne Bossuet