564 U.S. 338 (2011) Cited 6,691 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 6,995 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
573 U.S. 258 (2014) Cited 605 times 90 Legal Analyses
Holding that defendants may seek to rebut the Basic presumption at the class certification stage through evidence that the misrepresentation had no price impact
442 U.S. 682 (1979) Cited 1,993 times 12 Legal Analyses
Holding that claimants could bring social security class action "at least so long as the membership of the class is limited to those who meet the requirements of § 205(g)"
Holding that certification under Rule 23(b) was not appropriate because "plaintiffs' claims for compensatory and punitive damages must therefore focus almost entirely on facts and issues specific to individuals rather than the class as a whole"
Fed. R. Civ. P. 23 Cited 35,160 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"