Mississippi and Alabama joined Georgia in embracing the Georgia Platform. As a political ploy, the Platform thoroughly undermined any effective response from the Southern Rights parties. Generally the Compromise was popular throughout the South, and historian William J. Cooper Jr. made the point that, "Although the confrontation was not in fact a union-disunion one anywhere, the successful Unionist onslaught made it seem like one." Historian David Potter stated that the Georgia Platform "became the cornerstone of southern policy for several years."