From the text (p.246) ... 'In sum, because it was seen as deviation from the adaptive 'norm', behavioral flexibility in the class/task association among social insect workers initially was considered to be noise with respect to division of labor and ergonomic efficiency. However, its apparent universality is pushing flexibility from the peripheral position of noise or imperfection to the central focus of demographic studies. It has been found in soil insects wherever it has been sought, and serendipitously as well. I have suggested that the seeming conflict between class-based division of labor and the behavioral 'deviations' from it due to flexibility and task-switching can be resolved by considering both to be adaptive expressions along a single continuum, but functioning and under selection on different time scales. And I have presented a model to assess the relative expression of each, as well as a mechanism by which either can be elicited, as appropriate.'