In this article, Professor Marc Galanter challenges the notion that increases in the caseload of the federal courts reflect a general increased litigiousness on the part of the American public. He examines civil filings in federal district courts in six categories of cases that he calls the 'Big Six': civil rights, prisoner petitions, social security, recovery (mainly recovery of overpayments of veterans' benefits and of defaulted student loans), other contracts, and torts. He finds that the increase in litigation is not general over these areas; instead, the incidence of some kinds of cases is growing while that of others is falling. Professor Galanter suggest that different subpopulations of cases respond to specific conditions rather than to global changes and that control of the federal court caseload requires study of these conditions and of the effects on litigation that the cases themselves have.