Razib Khan's Unsupervised Learning

Available Episodes

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Jacob Shell: academia must diversify or die
On this episode of Unsupervised Learning Razib talks to Jacob Shell. Shell is a professor of geography at Temple University and author of Transportation and Revolt: Pigeons, Mules, Canals, and the Giants of the Monsoon Forest: Living and Working with Elephants. Educated at Columbia and Syracuse universities, Shell is active on social media, where he comments extensively on the politicization of the academy. The conversation begins with Shell’s piece in Compact Magazine, To Save Academia, Hire Conservatives. The more than 3,000-word essay argues that academia must diversify ideologically to save itself, but also engage in a wider range of scholarship. Shell points out that US academia has become an ideological monoculture, with an overwhelming dominance of left-leaning faculty, especially at elite institutions. This imbalance, driven by extreme partisan ratios in fields like anthropology, leaves universities politically vulnerable and out of step with the broader public. He challenges the common view that this trend is due to self-selection, or the “pipeline problem,” suggesting instead that informal screening mechanisms discourage or exclude conservative scholars. Shell also argues that the grant system encourages conformity and limits academic freedom. More audaciously, he argues that some academics should be singled out by their peers, whether through their institution or professional organizations,t when they engage in politically motivated misrepresentation of their scholarship. Ultimately, Shell insists that academia’s unique role in public life is to observe and understand the world, not to risk co-option as an arm of any political movement.
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1:43:54
Matt Welch: from blog pioneer to podcasting mainstay
On this episode of Unsupervised Learning Razib talks to Matt Welch. He co-founded the Prague-based newspaper Prognosis in the early 1990’s and later worked as an opinion section editor for the Los Angeles Times. From 2008-2016, Welch served as editor-in-chief of Reason magazine, where he currently holds the position of editor-at-large. He co-authored The Declaration of Independents: How Libertarian Politics Can Fix What's Wrong with America and wrote McCain: The Myth of a Maverick. Today, Welch co-hosts The Fifth Column podcast with Kmele Foster and Michael Moynihan. Razib and Welch first go back to his days in Eastern Europe, and how they shaped his views on foreign policy, making him somewhat heterodox for someone whose primary political inclinations favor libertarianism. Welch discusses how wild, hopeful and chaotic the 1990’s were in the former Eastern Bloc after the fall of the Iron Curtain and the end of Communism. He also argues that these nations had strong historic and contemporary geopolitical reasons to fear the former Soviet Union, and so pushed for the eastward expansion of NATO. Razib makes the Russian case that its turn away from the West in the 2000’s was in response to America’s strategy of encirclement, but Welch dismisses this as Russian revisionism. He believes that at the end of the day Soviet-era elites retained an imperial attitude toward Eastern and Central Europe rooted in a centuries-long assumption of Russian hegemonic status in the region. Next, retreating from abstruse foreign policy, Razib and Welch discuss the early days of the blogosphere, in 2001/2002. Then, Welch coined the term “warblogger,” and envisaged a scenario where post-partisan citizen-journalists would play an essential role in the information ecosystem of the 21st century. He discusses his disappointment with the reemergence of partisanship within the blogosphere, as well as the disappointments of post-9/11 interventionism. Welch also talks about the Tea Party, and its connection, and ultimate disconnect, from libertarianism. They also discuss how the Tea Party energy was eventually transferred to the ideologically heterodox and often anti-libertarian Trump movement. Finally, Welch talks about his latest primary venture, the successful The Fifth Column podcast. Razib asks if the current age of podcasting is analogous to the early blogosphere. Welch talks about how organically and gradually The Fifth Column came into being, and the growing pains with greater professionalization. He also addresses their future on The Fifth Column, with a new shift toward video, while continuing the informal and candid nature of the discussions.
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1:28:10
Bonus monologue: ancient North Africans and the Green Sahara
On this episode of Unsupervised Learning Razib comments on a new paper in Nature, Ancient DNA from the Green Sahara reveals ancestral North African lineage. Here is the abstract: Although it is one of the most arid regions today, the Sahara Desert was a green savannah during the African Humid Period (AHP) between 14,500 and 5,000 years before present, with water bodies promoting human occupation and the spread of pastoralism in the middle Holocene epoch1. DNA rarely preserves well in this region, limiting knowledge of the Sahara’s genetic history and demographic past. Here we report ancient genomic data from the Central Sahara, obtained from two approximately 7,000-year-old Pastoral Neolithic female individuals buried in the Takarkori rock shelter in southwestern Libya. The majority of Takarkori individuals’ ancestry stems from a previously unknown North African genetic lineage that diverged from sub-Saharan African lineages around the same time as present-day humans outside Africa and remained isolated throughout most of its existence. Both Takarkori individuals are closely related to ancestry first documented in 15,000-year-old foragers from Taforalt Cave, Morocco2, associated with the Iberomaurusian lithic industry and predating the AHP. Takarkori and Iberomaurusian-associated individuals are equally distantly related to sub-Saharan lineages, suggesting limited gene flow from sub-Saharan to Northern Africa during the AHP. In contrast to Taforalt individuals, who have half the Neanderthal admixture of non-Africans, Takarkori shows ten times less Neanderthal ancestry than Levantine farmers, yet significantly more than contemporary sub-Saharan genomes. Our findings suggest that pastoralism spread through cultural diffusion into a deeply divergent, isolated North African lineage that had probably been widespread in Northern Africa during the late Pleistocene epoch.
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18:12
Andrew Song: cooling the planet with technology
On this episode of Unsupervised Learning, Razib talks to Andrew Song, co-founder of Make Sunsets. An NYU graduate with a degree in economics, Song was a member of the Y Combinator class of winter 2016. Before becoming a founder, Song worked at firms involved in data analytics and artificial intelligence. A repeat attendee at the Founders Fund “Hereticon” conference, Song’s company has been profiled IEEE Spectrum, The New York Times and NPR. Razib and Song first talk about the current state of climate, or more precisely, climate change and anthropogenic global warming. Song argues that the emission-reduction strategy has fundamentally failed, and global warming is inevitable absent a drastic strategy shift. Enter geoengineering, the deliberate large-scale manipulation of an environmental process that affects the earth. In the context of global warming Song proposes that humans engage in proactive efforts to cool the world. His company, along with a similar Israeli startup, proposes to introduce particulate matter into the stratosphere to reflect back some of the sun’s radiation. Razib asks Song what the reaction has been, given that the atmosphere is a public resource, and how he proposes to eventually make it a revenue-generating business through government contracts. More generally, Razib and Song talk about other geoengineering projects, including Augustus Doricko’s dream of increasing precipitation through his Rainmaker firm.
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55:04
Zineb Riboua: realism in foreign policy in 2025
Today on Unsupervised Learning Razib talks to Zineb Riboua, a research fellow and program manager of Hudson Institute’s Center for Peace and Security in the Middle East. She specializes in Chinese and Russian involvement in the Middle East, the Sahel, and North Africa, great power competition in the region, and Israeli-Arab relations. Riboua’s pieces and commentary have appeared in the Wall Street Journal, Foreign Policy, the National Interest, the Jerusalem Post and Tablet among other outlets. She holds a master’s of public policy from the McCourt School of Public Policy at Georgetown University. She did her undergraduate studies in France, where she attended French preparatory classes and HEC Paris’ Grande Ecole program. Her Substack is Beyond the Ideological. Razib and Riboua discuss the Trump administration’s theory of tariffs as a tool of foreign policy and his attitudes toward multilateral diplomacy. They explore whether any principle beyond power and dominance underlies the current administration’s approach, and consider the role of principles and values in foreign policy. Riboua elaborates a realist perspective in line with the thinking of Henry Kissinger. States have interests and abilities to execute on those interests; idealism is secondary. Riboua also discusses the fact that Trump seems attuned to how foreign politicians relate to the American domestic scene. He seems willing to punish those abroad whom he perceives to be favorable to his political enemies and reward those who are personally favorable toward him. Razib then asks Riboua about the geopolitics of her native Morocco, a relatively stable monarchy on northwest Africa’s edge that has promoted moderate Islam, a good relationship with Europe and maintained a stable democracy.
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1:07:28