521 U.S. 591 (1997) Cited 6,955 times 69 Legal Analyses
Holding that courts are "bound to enforce" Rule 23's certification requirements, even where it means decertifying a class after they had reached a settlement agreement and submitted it to the court for approval
526 U.S. 574 (1999) Cited 4,159 times 12 Legal Analyses
Holding that, because "[t]hey keep the federal courts within the bounds the Constitution and Congress have prescribed," questions concerning subject matter jurisdiction "must be policed by the courts on their own initiative even at the highest level"
445 U.S. 388 (1980) Cited 2,013 times 10 Legal Analyses
Holding even a named plaintiff whose individual claims are moot retains a "personal stake" in representing the class jurisdictionally sufficient to appeal the denial of class certification
395 U.S. 486 (1969) Cited 3,054 times 1 Legal Analyses
Holding that the obviation of the petitioner's claim for injunctive relief did not render the whole case moot, when a damages claim for backpay remained
Fed. R. Civ. P. 23 Cited 34,939 times 1234 Legal Analyses
Holding that, to certify a class, the court must find that "questions of law or fact common to class members predominate over any questions affecting only individual members"