Personal jurisdiction is the first question in every case and the one most often decided by a doctrine that has changed twice in the last fifteen years. This article traces the arc from Pennoyer's territorial power theory through International Shoe's minimum contacts framework to the modern architecture, and explains what actually changed when Goodyear and Daimler collapsed general jurisdiction to the places a defendant is at home. It works specific jurisdiction element by element, including purposeful availment, the stream of commerce problem the Court has twice failed to resolve, the Calder effects test as narrowed by Walden, and the relatedness requirement that Bristol-Myers Squibb tightened and Ford Motor then loosened by holding that a claim may relate to forum contacts without being caused by them. It takes up Mallory v. Norfolk Southern and the revival of consent-by-registration, which may prove the most consequential jurisdictional development in a generation. It then covers venue including the patent venue rule of TC Heartland, transfer under the three transfer statutes, forum non conveniens, and forum selection clauses after Atlantic Marine, closing with the practical question of how a defendant preserves the defense and how a plaintiff avoids needing it.