4 SHELBY COUNTY v. HOLDER Syllabus acteristics. Congress based its coverage formula on that distinction. Today the Nation is no longer divided along those lines, yet the Voting Rights Act continues to treat it as if it were. Pp. 17–18. (2) The Government attempts to defend the formula on grounds that it is “reverse-engineered”—Congress identified the jurisdictions to be covered and then came up with criteria to describe them. Katzenbach did not sanction such an approach, reasoning instead that the coverage formula was rational because the “formula . . . was relevant to the problem.” 383 U. S., at 329, 330. The Government has a fallback argument—because the formula was relevant in 1965, its continued use is permissible so long as any discrimination remains in the States identified in 1965. But this does not look to “current political conditions,” Northwest Austin, supra, at 203, instead relying on a comparison between the States in 1965. But history did not end in 1965. In assessing the “current need[ ]” for a preclearance system treating States differently from one another today, history since 1965 cannot be ignored. The Fifteenth Amendment is not designed to punish for the past; its purpose is to ensure a better future. To serve that purpose, Congress—if it is to divide the States—must identify those jurisdictions to be singled out on a basis that makes sense in light of current conditions. Pp. 18–21. (3) Respondents also rely heavily on data from the record compiled by Congress before reauthorizing the Act. Regardless of how one looks at that record, no one can fairly say that it shows anything approaching the “pervasive,” “flagrant,” “widespread,” and “rampant” discrimination that clearly distinguished the covered jurisdictions from the rest of the Nation in 1965. Katzenbach, supra, at 308, 315, 331. But a more fundamental problem remains: Congress did not use that record to fashion a coverage formula grounded in current conditions. It instead re-enacted a formula based on 40-year-old facts having no logical relation to the present day. Pp. 21–22. 679 F. 3d 848, reversed. ROBERTS, C. J., delivered the opinion of the Court, in which SCALIA, KENNEDY, THOMAS, and ALITO, JJ., joined. THOMAS, J., filed a concurring opinion. GINSBURG, J., filed a dissenting opinion, in which BREYER, SOTOMAYOR, and KAGAN, JJ., joined.

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