Featured clue | 7-down: Modern, brutish version of “I challenge thee to a duel”
Factoid | 61-across/11-down: Cari Tuna and her husband Dustin Moskovitz founded a non-profit, Good Ventures, which adheres to principles of Effective Altruism. This means “using evidence and reason to figure out how to benefit others as much as possible, and taking action on that basis” through impartiality, cause prioritization, cost-effectiveness, and counterfactual reasoning.