Russian Orthodox Christianity. So im assuming the answer is Christianity.
It granted citizenship and equal civil and legal rights to African Americans and slaves who had been emancipated after the American Civil War
The plantation system developed for several reasons. The Southern colonies had been founded by companies or proprietors who wished to make a profit, and they accordingly encouraged cash crops like tobacco (in the Chesapeake) and rice (in the Low Country). These crops were labor intensive, which meant that growers turned first to indentured servants and then to African slaves as a labor supply (so, too, did sugar planters in the Caribbean.) They also required a great deal of land and capital, which meant that due to an economic principle called "economies of scale," cash crops, especially rice, favored very wealthy people with large landholdings and access to large labor forces. So in the Southern colonies/United States, the economic realities of staple crop production favored the formation of large farms, or plantations. Cotton, which emerged as the biggest cash crop in the nineteenth-century South, was less shaped by economies of scale--many small planters and farmers could profitably raise the crop. But even still, the largest cotton planters in places like Alabama and Mississippi dominated the Southern economy and increasingly its politics. Large capital investments in land and enslaved people made the production of large amounts of cotton profitable, so the region's dependence on cash crops continued to foster the plantation system.
Theodore Roosevelt inherited an empire-in-the-making when he assumed office in 1901. After the Spanish-American War in 1898, Spain ceded the Philippines, Puerto Rico, and Guam to the United States. In addition, the United States established a protectorate over Cuba and annexed Hawaii. For the first time in its history, the United States had acquired an overseas empire. As President, Roosevelt wanted to increase the influence and prestige of the United States on the world stage and make the country a global power. He also believed that the exportation of American values and ideals would have an ennobling effect on the world. TR's diplomatic maxim was to "speak softly and carry a big stick," and he maintained that a chief executive must be willing to use force when necessary while practicing the art of persuasion. He therefore sought to assemble a powerful and reliable defense for the United States to avoid conflicts with enemies who might prey on weakness. Roosevelt followed McKinley in ending the relative isolationism that had dominated the country since the mid-1800s, acting aggressively in foreign affairs, often without the support or consent of Congress.