Alex Inkeles approaches the subject of national character by surveying various definitions, tracing developments through the twentieth century, and by examining the regularity of specific personality patterns among individuals in a society. Reviewing previous studies, Inkeles canvasses the attitudes and psychological states of different nations in an effort to discover a set of values in the United States. He concludes that, despite recent advances in the field, there is much to be done before we can have a clear picture of the degree of differentiation in the personality structure of modern nations.