Tolman has attempted '… to schematize the interconnections between the basic biological drives, the derived social techniques and also between these and certain types of final behavior-propensity'. He assumes some fifteen biological drives on the basis of animal experiments and other evidence, all of which are considered as one unit or libido. These drives are thought to be converted as a result of frustration into social techniques and into still further derived forms if the techniques are frustrated. The social techniques are grouped into four categories, (a) self-assertive techniques, (b) collective techniques, (c) self-abasive techniques, and (d) collective assertive techniques. The channels of drive conversion leading up to war are traced; 'neurotic war' is represented as the result of repressed hostilities. This attempt to schematize the conversion of the basic biological drives was not offered as a final thought on the matter but rather '… a scheme more for the asking of important question'.