 We find that heterogeneous population structures, where some individuals have many more interaction partners than others, are extremely conducive for the evolution of prosocial behaviors.
<clarity>  We find that heterogeneous population structures, where some individuals have many more interaction partners than others, are extremely conducive for the evolution of prosocial behaviors.
 We find that heterogeneous networks, wherein some individuals have many more interaction partners than others, are extremely conducive for the evolution of prosocial behaviors.