Ben Keener
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btkeener.bsky.social
Ben Keener
@btkeener.bsky.social
Pinned
Now online with the Penn Law Review!

SSRN: papers.ssrn.com/sol3/papers....
Now online with the Penn Law Review!

SSRN: papers.ssrn.com/sol3/papers....
November 20, 2025 at 10:53 PM
Reposted by Ben Keener
Both Legal Theory Blog and the Legal Theory Lexicon are moving to Wordpress and new web addresses:

Legal Theory Blog: Legal Theory Blog: Legal Theory Blog: legaltheoryblog.com

Legal Theory Lexicon: https:/legaltheorylexicon.com/
legaltheoryblog.com
buff.ly
September 26, 2025 at 1:00 PM
I’ll continue to direct interested readers to my paper “Calvin’s Case and Birthright Citizenship” (with Penn Law Review) that explains the origins of the rule in detail. “Jus soli” might not have been used in 1608, but it didn’t appear out of thin air

papers.ssrn.com/sol3/papers....
July 17, 2025 at 7:07 PM
Reposted by Ben Keener
... and national security in Hong Kong). Articles are from Jeffrey Goldsworthy (on Dr Bonham's Case); @anuragdeb.bsky.social and @colinmurray.bsky.social (on Art 2 of the Winsor Framework the Legacy Act and the IMA); Lisa Burton Crawford and Janina Boughey (on Automated Information about Law); ...
June 19, 2025 at 12:52 PM
It is a huge honor to be cited by Jeffrey Goldsworthy, a titan of public law and legal philosophy. Everyone should read his latest synopsis of the literature on Bonham's Case.
July 9, 2025 at 12:25 AM
Thanks very much, @evanbernick.bsky.social! Still waiting on a rebuttal 🤷🏻‍♂️
This is an important paper from Ben Keener. To my eye, it demonstrates that there is no plausible argument that unlawful entrants are not “in amity” with the U.S., and thus no argument against their childrens’ birthright citizenship can depend upon it. papers.ssrn.com/sol3/papers....
May 19, 2025 at 11:31 PM
Thank you for the share @lsolum.bsky.social !
Keener on Calvin's Case and Birthright Citizenship, buff.ly/RUgOXuQ - Benjamin Keener (University of Pennsylvania Carey Law School) has posted Calvin's Case and Birthright Citizenship (University of Pennsylvania Law Review Online, Vol. 174 (forthcoming)) on SSRN.
Keener on Calvin's Case and Birthright Citizenship
Benjamin Keener (University of Pennsylvania Carey Law School) has posted Calvin's Case and Birthright Citizenship (University of Pennsylvania Law Review Online, Vol. 174 (forthcoming)) on SSRN. Here is...
buff.ly
May 7, 2025 at 11:38 AM
Reposted by Ben Keener
When CJ John Marshall ruled that PA was obliged to return a prize of war in US v. Peters (1809), governor Snyder raised a militia army to resist enforcement. When asked to support PA and defy the Supreme Court, President Madison wrote: (1/3)
May 4, 2025 at 5:23 PM
When CJ John Marshall ruled that PA was obliged to return a prize of war in US v. Peters (1809), governor Snyder raised a militia army to resist enforcement. When asked to support PA and defy the Supreme Court, President Madison wrote: (1/3)
May 4, 2025 at 5:23 PM
For those interested in what enemy invasions looked like as a matter of English common law, I’d direct them to my latest paper, pages 15 on

papers.ssrn.com/sol3/papers....
May 1, 2025 at 5:21 PM
Grateful for the acknowledgement from the ImmigrationProf Blog!

lawprofessors.typepad.com/immigration/...
May 1, 2025 at 4:49 PM
Thanks very much for the mention!
Keener on Calvin's Case and Birthrigth Citizenship
Benjamin Keener, University of Pennsylvania Carey Law School, has posted Calvin's Case and Birthright Citizenship, which appears in the University of Pennsylvania Law Review Online: Calvin’s Case established the birthright rule for English subjects. President Trump’s Executive Order 14160 asserts that the children of illegally present aliens are not natural born citizens because they are not “subject to the jurisdiction” of the United States. Certain scholars defending this executive order claim that the birthright rule in Calvin’s Case helps determine the meaning of “subject to the jurisdiction” in the Fourteenth Amendment’s Citizenship Clause. These scholars claim that the rule requires alien parents to be “in amity” to give birth to natural born subjects. They claim that illegally present parents do not have this status. These readings of Calvin’s Case are wrong. Furthermore, a birthright rule requiring parental “amity” would still guarantee citizenship for the children of illegally present aliens. By probing the meanings of allegiance, natural-born subjecthood, and enemy alienage, this essay clarifies the extent to which Calvin’s Case and the common law can inform the meaning of the Citizenship Clause. Calvin’s Case supports the traditional understanding that individuals born in the United States are, absent extraordinary circumstances, citizens. --Dan Ernst
dlvr.it
April 30, 2025 at 11:40 AM
Thanks for the share, @evanbernick.bsky.social ! I'll look forward to engagement as well
For those interested: this was just published in the Penn Law Review Online. No engagement yet from Wurman, although he says he’ll get there. papers.ssrn.com/sol3/papers....
April 29, 2025 at 7:10 PM
Interesting debate today. Most interesting, besides the qualification that the order may be unconstitutional, is the note at 41:10 that aliens present in amity get a right to a treason trial (1/4)
April 24, 2025 at 8:10 PM
Reposted by Ben Keener
Estreicher & Reddy on Birthright Citizenship, buff.ly/iHuWmr5 - Samuel Estreicher (New York University School of Law) & Rudra Reddy have posted Revisiting the Scope of Constitutional Birthright Citizenship on SSRN.
buff.ly
April 22, 2025 at 11:05 PM
Reposted by Ben Keener
Ablavsky & Berger on Birthright Citizenship -- "Subject to the Jurisdiction Thereof: The Indian Law Context"
Gregory Ablavsky (Stanford Law) and Bethany Berger (University of Iowa College of Law) have posted "Subject to the Jurisdiction Thereof: The Indian Law Context" - a timely intervention in the debate over birthright citizenship. The article will appear in the online companion to the New York University Law Review. Here's the abstract: Section 1 of the Fourteenth Amendment provides that “All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside.”  Much of the debate over the meaning of this provision in the nineteenth century, especially what it meant to be “subject to the jurisdiction” of the United States, concerned the distinctive status of Native peoples—who were largely not birthright citizens even though born within the borders of United States.  It is unsurprising, then, that the Trump Administration and others have seized on these precedents in their attempt to unsettle black-letter law on birthright citizenship.  But their arguments that this history demonstrates that jurisdiction meant something other than its ordinary meaning at the time—roughly, the power to make, decide, and enforce law—are anachronistic and wrong. They ignore the history of federal Indian law. For most of the first century of the United States, the unique status of Native nations as quasi-foreign entities was understood to place these nations’ internal affairs beyond Congress’s legislative jurisdiction. By the 1860s, this understanding endured within federal law, but it confronted increasingly vocal challenges. The arguments over the Fourteenth Amendment, then, recapitulated this near century of debate over Native status. In crafting the citizenship clause, members of Congress largely agreed that jurisdiction meant the power to impose laws; where they heatedly disagreed was whether Native nations were, in fact, subject to that authority. Most concluded they were not, and in 1884, in Elk v. Wilkins, the Supreme Court affirmed the conclusion that Native nations’ quasi-foreign status excluded tribal citizens from birthright citizenship.  But the “anomalous” and “peculiar” status of Native nations, in the words of the nineteenth-century Supreme Court, means that the law governing tribal citizens cannot and should not be analogized to the position of other communities—or at least any communities who lack a quasi-foreign sovereignty and territory outside most federal and state law but within the borders of the United States. Indeed, the Court in Wong Kim Ark expressly rejected the attempt to invoke Elk v. Wilkins to deny birthright citizenship to a Chinese man born in the U.S. to non-citizen parents, ruling that the decision “concerned only members of the Indian tribes within the United States.” The analogy has no more validity today than it did then, and the current Court should continue to reject it. Read on here, at SSRN. -- Karen Tani
dlvr.it
April 21, 2025 at 6:52 AM
Reposted by Ben Keener
Keener's article is here. Wurman has said he'll respond to it. For now, however, the draft is missing a jarring claim from op-ed that seems clearly wrong. End. papers.ssrn.com/sol3/papers....
Calvin's Case and Birthright Citizenship
<p>Calvin’s Case established the birthright rule for English subjects. President Trump’s Executive Order 14160 asserts that the children of illegally present al
papers.ssrn.com
April 17, 2025 at 3:35 PM
Reposted by Ben Keener
There are two big problems here, elegantly set forth in an important @btkeener.bsky.social essay about the legacy of Calvin's Case, the foundational common-law birthright citizenship decision. The first: It's not clear parental amity matters. The second: Unlawful entrants are certainly in amity. 2.
April 17, 2025 at 3:35 PM
April 15, 2025 at 6:02 PM
Reposted by Ben Keener
One of the striking omissions here (which Wurman, to his credit, says he’ll cure) is that the draft doesn’t engage @btkeener.bsky.social on whether unlawful entrants were “in amity” with the U.S. I think it very clear that they were, which would make their children citizens. And I can’t but observe…
April 15, 2025 at 5:54 PM