The Sixth Edition integrates all significant developments that have occurred since the last revision of this casebook in 2017. These changes include new principal cases that reflect changes in the law with particular emphasis on personal jurisdiction, and a number of amended problems and notes to reflect all changes in such other areas, such as the definition of citizenship for diversity purposes, transfer of venue, pleading, and class actions. The Sixth edition also includes a full discussion and analysis of all intervening Supreme Court and important lower court opinions, and changes in the Federal Rules of Civil Procedure, all up through May 20, 2023. Any subsequent major decisions will be made available in an online Supplement.