Evolutionary and genetic inequality statements do not have to support right-wing policies. Pinker writes that if everyone is equal regarding abilities it can be argued that it is only necessary to give everyone equal opportunity. On the other hand, if some people have less innate ability, then redistribution policies should favor those with less innate ability. Further, economics is built upon an assumption of an actor, while evolutionary psychology suggests that people have many different goals and behaviors that do not fit the actor theory. "A rising tide lifts all boats" is often used as an argument that inequality need not be reduced as long as there is growth. Evolutionary psychology suggests that low status itself, apart from material considerations, is highly stressful towards the brain and may cause dangerous behaviors, which suggests that inequalities should be reduced. Finally, evolutionary explanations may also help the left create policies with greater public support, suggesting that people's sense of fairness (caused by mechanisms such as reciprocal altruism) rather than greed is a primary cause of opposition to welfare, if there is not a distinction in the proposals between what is perceived as the deserving and the undeserving poor.