This Social Science Bites podcast offers a dollop of good news and heaping helping of bad. The good news is that since the end of American Civil War the economic condition of Back Americans has improved, using as a comparison the presumed status quo population of white Americans. According to Princeton University economist Ellora Derenoncourt, this "wealth gap" has fallen from 60-to-one to six-to-one in the intervening 160 years.

While that's heartening, as Derenoncourt details for interviewer David Edmonds, that six-to-one gap hasn't budged since the 1950s. The academic, the founder and faculty director for Princeton's Program for Research on Inequality, breaks down that stall using historical data, parsing out differences between classes and also discussing the difference between income and assets.

"Income," she notes, "has its own growth process, and income between the two groups has been converging over the last 150 years, and savings from income helped Black Americans accumulate some wealth, driving the racial wealth gap down." But as incomes came closer, accumulated assets and the wealth derived from that have only inched closer, driven in part by generational wealth, especially in housing.

"[F]or most Americans, housing is their wealth," she explains. "And we can keep going down the distribution to ask, '"'When is it the case that white Americans at this point in the distribution are mostly renters versus homeowners?'"' That's where we're going to start to see these dynamics of the wealth gap shift.

Derenoncourt closes with some policy ideas that could accelerate closing the gap, including the politically hot topic of slavery reparations.

There is a value to shared knowledge that tends to go unrecognized because it's so ubiquitous. Nonetheless, experimental psychologist Steven Pinker explains in this Social Science Bites podcast, common knowledge underlies things like paper money, governance, and even coral reefs.

And common knowledge, he makes clear to host David Edmonds, "does not have its ordinary sense of conventional wisdom or an open secret or something that everyone knows, but rather something that everyone knows that everyone knows, and everyone knows that, and everyone knows that, and so on, ad infinitum."

Possing that shared knowledge – and the knowledge that others share that knowledge – creates the conditions for coordination, and thus action beyond what an individual could achieve. That's the reason, he says, "that autocrats fear common knowledge of the regime's shortcomings is that no regime has the firepower to intimidate every last citizen."

Pinker, the Johnstone Professor of Psychology at Harvard University, details his understanding of the virtues and vices of common knowledge in his most recent book, When Everyone Knows That Everyone Knows...: Common Knowledge and the Mysteries of Money, Power, and Everyday Life. The book, his 13th, continues his streak as one of the most publicly recognized of public intellectuals, including recognition as one of Foreign Policy's "World's Top 100 Public Intellectuals" and Time's "100 Most Influential People in the World Today." He is also only the second (so far) returning guest to Social Science Bites, having addressed violence and human nature in a 2012 podcast.

A key insight social anthropologist Mukulika Banerjee had while observing electoral behavior in a Bengali village was that -- at least in the India of that moment -- elections were sacred. This was not a religious epiphany but a cultural one; at the center was not a figure, religious or political, but an ideal - democracy.

Banerjee has explored her insights in the years since in a variety or formats, but academic and popular, ranging from her written work like 2021's Cultivating Democracy: Politics and citizenship in agrarian India or 2014's Why India Votes? to a 2009 radio documentary for the BBC specifically titled "Sacred Elections." In this Social Science Bites podcast, the professor at the London School of Economics reviews much of the underlying scholarship behind those works, then explores with host David Edmonds the de-sanctification of democracy in both India and the Global North in the years since.

"I think what has happened ... in the US and in the UK," she explains, "is a complacency that regardless of whether you do your little bit, whether it is literally just turning up to vote or learning to organize and be informed politically, is going to happen regardless of whether you do it or not. And because of this complacency, is precisely why these degenerations of democracy have happened."

Banerjee is the founding series editor of Routledge's Exploring the Political in South Asia and is also working on a grant from the Indo-European Networking Programme in the Social Sciences on Explanations of Electoral Change in Urban and Rural India. This year, courtesy of a British Academy-Leverhulme Senior Fellowship, she is on a research sabbatical studying the nexus of democracy and taxation.