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
Holding that an individual who did not file an EEOC charge may opt into an ADEA class action by "piggybacking" onto a timely charge filed by one of the named plaintiffs, provided that the claims of the named plaintiff and the piggybacking plaintiff arise out of similar discriminatory treatment in the same time frame
Adopting a balancing approach with guidance from Blair and Mowbray and adding two additional "guideposts": the nature and status of the litigation and the likelihood that future events would make immediate review more or less appropriate
Holding that the antitrust claims of disparate groups, distributors of vitamins and producers of end-products incorporating vitamins, could not be mixed together where the interests of the class representatives and some class members were " significantly different"
Holding that the "right question" is not whether the plaintiff has alleged "facts that tend to defeat affirmative defenses," but "whether it is possible to imagine proof of the critical facts consistent with the allegations in the complaint" that would fall within the period of limitations
Holding the Modafinil vacatur and remand did "not foreclose the possibility of class status in case, or where putative class is of similar composition."
Concluding that plaintiff steel companies alleged antitrust injury from inflated dock handling charges resulting from defendant railroads' conspiracy even though dock companies were also victims
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"