Sometimes societies lagged because of physical isolation from these cross-currents of exchange and interaction.

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Reeves saw a need for greater exchange and interaction between students in both countries and believed that through working together, true bonds of friendship could be created.

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Now we can look at the actual patterns of interaction, of exchange between people.

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About 20 years ago psychologist Alan Page Fiske and author of Structures of Social Life (Free Press 1993), now Professor of Anthropology at UCLA, wrote about the Four Elementary Forms of Sociality that describe our mental orientation of the form of exchange that we think we should use in each interaction with someone else.

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