16 January 2019 – The poster child for rampant nationalism is Hitler’s National Socialist German Workers’ Party, commonly called the Nazi Party. I say “is” rather than “was” because, while resoundingly defeated by Allies of WW2 in 1945, the Nazi Party still has widespread appeal in Germany, and throughout the world.

These folks give nationalism a bad name, leading to the Oxford Living Dictionary, giving primacy to the following definition of nationalism: “Identification with one’s own nation and support for its interests, especially to the exclusion or detriment of the interests of other nations.” [Emphasis added.]

The Oxford Dictionary also offers a second definition of nationalism: “Advocacy of or support for the political independence of a particular nation or people.”

This second definition is a lot more benign, and one that I wish were more often used. I certainly prefer it!

Nationalism under the first definition has been used since time immemorial as an excuse to create closed, homogeneous societies. That was probably the biggest flaw of the Nazi state(s). Death camps, ethnic cleansing, slave labor, and most of the other evils of those regimes flowed directly from their attempts to build closed, homogeneous societies.

Under the second definition, however, nationalism can, and should, be used to create a more diverse society.

That’s a good thing, as the example of United States history clearly demonstrates. Most of U.S. success can be traced directly to the country’s ethnic, cultural and racial diversity. The fact that the U.S., with a paltry 5% of the world’s population, now has by far the largest economy; that it dominates the fields of science, technology and the humanities; that its common language (American English) is fast becoming the “lingua franca” of the entire world; and that it effectively leads the world by so many measures is directly attributed to the continual renewal of its population diversity by immigration. In any of these areas, it’s easy to point out major contributions from recent immigrants or other minorities.

This harkens back to a theory of cultural development I worked out in the 1970s. It starts with the observation that all human populations – no matter how large or how small – consist of individuals whose characteristics vary somewhat. When visualized on a multidimensional scatter plot, populations generally consist of a cluster with a dense center and fewer individuals farther out.

This pattern is similar to the image of a typical globular star cluster in the photo at right. Globular star clusters exhibit this pattern in three dimensions, while human populations exist and can be mapped on a great many dimensions representing different characteristics. Everything from physical characteristics like height, weight and skin color, to non-physical characteristics like ethnicity and political ideology – essentially anything that can be measured – can be plotted as a separate dimension.

The dense center of the pattern consists of individuals whose characteristics don’t stray too far from the norm. Everyone, of course, is a little off average. For example, the average white American female is five-feet, four-inches tall. Nearly everyone in that population, however, is a little taller or shorter than exactly average. Very few are considerably taller or shorter, with more individuals closer to the average than farther out.

The population’s diversity shows up as a widening of the pattern. That is, diversity is a measure of how often individuals appear farther out from the center.

Darwin’s theory of natural selection posits that where the population center is depends on where is most appropriate for it to be depending on conditions. What is average height, for example, depends on a complex interplay of conditions, including nutrition, attractiveness to the opposite sex, and so forth.

Observing that conditions change with time, one expects the ideal center of the population should move about in the multidimensional characteristics space. Better childhood nutrition, for example, should push the population toward increased tallness. And, it does!

One hopes that these changes happen slowly with time, giving the population a chance to follow in response. If the changes happen too fast, however, the population is unable to respond fast enough and it goes extinct. So, wooly mammoths were unable to respond fast enough to a combination of environmental changes and increased predation by humans emigrating into North America after the last Ice Age, so they died out. No more wooly mammoths!

Assuming whatever changes occur happen slowly enough, those individuals in the part of the distribution better adapted to the new conditions do better than those on the opposite side. So, the whole population shifts with time toward characteristics that are better adapted.

Where diversity comes into this dynamic is by providing more individuals in the better-adapted part of the distribution. The faster conditions change, the more individuals you need at the edges of the population to help with the response. For example, if the climate gets warmer, it’s folks who like to wear skimpy outfits who thrive. Folks who insist on covering themselves up in heavy clothing, don’t do so well. That was amply demonstrated when Englishmen tried to wear their heavy Elizabethan outfits in the warmer North American weather conditions. Styles changed practically overnight!

Closed, homogeneous societies of the type the Nazis tried to create have low diversity. They try to suppress folks who differ from the norm. When conditions change, such societies have less of the diversity needed to respond, so they wither and die.

That’s why cultures need diversity, and the more diversity, the better.

We live in a chaotic universe. The most salient characteristic of chaotic systems is constant change. Without diversity, we can’t respond to that change.

That’s why when technological change sped up in the early Twentieth Century, it was the bohemians of the twenties developing into the beatniks of the fifties and the hippies of the sixties that defined the cultures of the seventies and beyond.

Long live Ben and Jerry’s Cherry Garcia Ice Cream!