If Allan Pinkerton had not accompanied Lincoln to Baltimore, Lincoln would have been assassinated and Hannibal Hamlin would have become president. With Hamlin as president, the Confederacy would have gained independence and allied with Great Britain and Canada, allowing slavery to continue. The United States would not have become a world power, remaining smaller than the Confederacy and focused only on North America rather than global affairs. By the 2000s, the United States would have been bordered by the Confederacy and Canada, with less international trade and influence than in our actual history.