The Federation for the Support of Jewish Charities recently instituted a campaign to raise millions of dollars for what it called its United Building Fund. The directors of that campaign might have subdivided society for their purpose into two groups, the Jewish and the non-Jewish group, or they might have decided that there were rich people who could give and poor people who could not give. But they realized the interlapping nature of the groups they wanted to reach. They analyzed these component groups closely and divided them into groups which had common business interests. For instance, they organized a group of dentists, a group of bankers, a group of real estate operators, a group of cloak-and-suit-house operators, a group of motion picture and theatrical owners and others. Through an approach to each group on the strongest appeal to which the members of the group as a group would respond, the charity received the support of the individuals who made it up. The social aspirations of the group, the ambitions for leadership of the group, the competitive desires and philanthropic tendencies of the individuals who made up these groups were capitalized. The interlapping nature of these groups made it possible, too, for the public relations counsel to reach all the individuals by appeals that were directed not merely to the individual as a member of the business group with which he was aligned, but also as a member of a different group. For instance, as a humanitarian, as a public-spirited citizen, or as a devoted Jew. Because of this interlapping characteristic of groups, the organization was able to accomplish its purpose more successfully.