
And the causes are partly linked to experience. Demographically, younger and older Americans grew up in vastly different worlds. Those born after the civil rights era lived in a country of high rates of legal and illegal immigration. In their neighborhoods and schools, the presence of immigrants was as hard to miss as a Starbucks today.
In contrast, baby boomers and older Americans — even those who fought for integration — came of age in one of the most homogenous moments in the country’s history.
Immigration, which census figures show declined sharply from the Depression through the 1960s, reached a historic low point the year after Woodstock. From 1860 through 1920, 13 percent to 15 percent of the country was foreign born — a rate similar to today’s, when immigrants make up about 12.5 percent of the country.