The National Gallery <a href=" http://aiapets.com/generic-accutane-uk.pdf ">accutane privately uk</a> The trio readily admit that their conclusions do not suggest that climate is the only – "or even primary" – driver of human conflict. What they do conclude, however, is that large climatic changes have been observed to "have substantial effects on the incidence of conflict" that "appears to extend across the world, throughout history, and at all scales of social organization."