The why of the social behaviours has been a frecuent a question during almost the whole history and this doesn't just implicate the humans but with other groups of animales that as a result of that study pretend to undestand since a phylogenetic vision, in the cases where applicable one onecoming to the answer of this question, even arriving to create academics aproaches with this end like how is the ethology, the comparative psychology and other disciplines; this investigation its been influenced by these same currents and the interest of exploring poorly addressed species in a social aspect. On doing a bibliography review it was decided to focus on the spider monkeys Ateles fusciceps in the Bioparque Wakatá and them cooperative behaviours, this is a process guided for the investigation area of CIDS, in the line of the social brain, ecology an convivence.