 For a period spanning two decades, however, the genic selectionists did not acknowledge that the position they attacked, namely group selection as engineering adaptation, is significantly different from other available approaches to group selection, such as those that primarily treat groups as interactors. Ultimately, however, genic selectionists did recognize the significance of the distinction between the interactor question and the manifestor-of-adaptation question. In 1985, for example, we have progress towards mutual understanding: 