The paper title is Believing there is no free will corrupts intuitive cooperation, and the authors are John Protzko, Brett Ouimette, and Jonathan Schooler. The abstract is this:
Regardless of whether free will exists, believing that it does affects one’s behavior. When an individual’s belief in free will is challenged, one can become more likely to act in an uncooperative manner. The mechanism behind the relationship between one’s belief in free will and behavior is still debated. The current study uses an economic contribution game under varying time constraints to elucidate whether reducing belief in free will allows one to justify negative behavior or if the effects occur at a more intuitive level of processing. Here we show that although people are intuitively cooperative, challenging their belief in free will corrupts this behavior, leading to impulsive selfishness. If given time to think, however, people are able to override the initial inclination toward self-interest induced by discouraging a belief in free will.
I would say that we need a large swathe of society to believe in ideals of free will and individual responsibility, even though such concepts are not entirely faultless from a metaphysical point of view. For a given thinker, it is worth asking whether he or she adds to or takes away from that social belief. For some writers, the concepts of individual blame and responsibility apply only to their intellectual adversaries!
For the pointer I thank Ben Southwood.