564 U.S. 338 (2011) Cited 6,675 times 505 Legal Analyses
Holding in Rule 23 context that “[w]ithout some glue holding the alleged reasons for all those decisions together, it will be impossible to say that examination of all the class members' claims for relief will produce a common answer”
521 U.S. 591 (1997) Cited 6,983 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
559 U.S. 393 (2010) Cited 1,161 times 44 Legal Analyses
Holding that rules of civil procedure allowing multiple claims to be litigated together "neither change plaintiffs' separate entitlements to relief nor abridge defendants' rights; they alter only how the claims are processed"
472 U.S. 797 (1985) Cited 1,791 times 19 Legal Analyses
Holding that “the Due Process Clause of course requires that the named plaintiff at all times adequately represent the interests of the absent class members”
414 U.S. 538 (1974) Cited 2,123 times 162 Legal Analyses
Holding the commencement of a class action "suspends the applicable statute of limitations as to all asserted members of the class who would have been parties had the suit been permitted to continue as a class action"
431 U.S. 395 (1977) Cited 1,305 times 1 Legal Analyses
Holding that plaintiffs who lacked qualifications to be hired as drivers suffered no injury from alleged discriminatory practices and therefore lacked standing to represent class of persons who did suffer injury
463 U.S. 60 (1983) Cited 751 times 9 Legal Analyses
Holding ban on "unsolicited advertisements for contraceptives" was not narrowly tailored to interest in "aiding parents' efforts to discuss birth control with their children."
Holding that false advertising "class must be defined in such a way as to include only members who were exposed to advertising that is alleged to be materially misleading"
Fed. R. Civ. P. 23 Cited 35,111 times 1237 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"