Whitman argues that group selection is consistent with methodological individualism. He begins by defining a weak form of methodological individualism in which agents are not necessarily self-interested or rational and shows that this form of is consistent with Sober and Wilson’s model of group selection. However, Sober and Wilson’s group selection is also consistent with a methodological indiv...

care and evacuation. In addition, all of the chapters include material on the handling of mass casualties. This is a most useful and authoritative little book, which brings together current concepts in the care of the many forms of trauma seen in war time. To have access to such a handbook would be of great value to a physician faced with the problems of care of the wounded. It should be requir...

Since its "rebirth" in 1966, bipolar disorder (BPD) has rapidly come to occupy a central position in the research and treatment of mood disorders. Compared with major depressive disorder (MDD), BPD is a more serious condition, characterized by much more frequent recurrence, more complex comorbidity, and higher mortality. One major problem is the lack of valid definitions in adult and in child p...

Instrumentality or expectancy theories have recently been used to predict the effort, performance and satisfaction of employees In various organizational settings. The thecry states that behavior can be predicted from (1) the probability of the act leadln» to some outcomes multiplied by (2) the evaluation of thesa outcomes. Much of the research using these ideas was originally conducted in the ...