Survival instinct does not influence species cooperative breeding decisions, a new study has found. Instead, it has found communal living and helping behavior, to be a natural result of monogamous relationships reinforcing stronger genetic bonds in family groups. Siblings with full biological ties are more likely than others to stay with their family, than they are to break away. This is particularly beneficial in harsh environments, like the desert, but not the overall reason why they choose to live in this way.