Northern United States in the context of "Gilded Age"

The Republican Party, also known as the Grand Old Party (GOP), is a conservative and right-wing political party in the United States. It emerged as the main rival of the Democratic Party in the 1850s, and the two parties have dominated American politics since then.

The Republican Party was founded in 1854 by anti-slavery activists opposing the Kansas–Nebraska Act and the expansion of slavery into U.S. territories. It rapidly gained support in the North, drawing in former Whigs and Free Soilers. Abraham Lincoln's election in 1860 led to the secession of Southern states and the outbreak of the American Civil War. Under Lincoln and a Republican-controlled Congress, the party led efforts to preserve the Union, defeat the Confederacy, and abolish slavery. During the Reconstruction era, Republicans sought to extend civil rights protections to freedmen, but by the late 1870s the party shifted its focus toward business interests and industrial expansion. In the late 19th and early 20th centuries, it dominated national politics, promoting protective tariffs, infrastructure development, and laissez-faire economic policies, while navigating internal divisions between progressive and conservative factions. The party's support declined during the Great Depression, as the New Deal coalition reshaped American politics. Republicans returned to national power with the 1952 election of Dwight D. Eisenhower, whose moderate conservatism reflected a pragmatic acceptance of many New Deal-era programs.

The legal institution of human chattel slavery, comprising the enslavement primarily of Africans and African Americans, was prevalent in the United States of America from its founding in 1776 until 1865, predominantly in the South. Slavery was found throughout European colonization in the Americas. From 1526, during the early colonial period, it was practiced in what became Britain's colonies, including the Thirteen Colonies that formed the United States. Under the law, children were born into slavery, and an enslaved person was treated as property that could be bought, sold, or given away. Slavery lasted in about half of U.S. states until abolition in 1865, and issues concerning slavery seeped into every aspect of national politics, economics, and social custom. In the decades after the end of Reconstruction in 1877, many of slavery's economic and social functions were continued through segregation, sharecropping, and convict leasing. Involuntary servitude as a punishment for crime remains legal.

By the time of the American Revolutionary War (1775–1783), the status of enslaved people had been institutionalized as a racial caste associated with African ancestry. During and immediately following the Revolution, abolitionist laws were passed in most Northern states and a movement developed to abolish slavery. The role of slavery under the United States Constitution (1789) was the most contentious issue during its drafting. The Three-Fifths Clause of the Constitution gave slave states disproportionate political power, while the Fugitive Slave Clause (Article IV, Section 2, Clause 3) provided that, if a slave escaped to another state, the other state could not prevent the return of the slave to the person claiming to be his or her owner. All Northern states had abolished slavery to some degree by 1805, sometimes with completion at a future date, and sometimes with an intermediary status of unpaid indentured servitude.

The Whig Party was a mid-19th century political party in the United States. Alongside the Democratic Party, it was one of two major parties from the late 1830s until the early 1850s and part of the Second Party System. As well as four Whig presidents (William Henry Harrison, John Tyler, Zachary Taylor, and Millard Fillmore), other prominent members included Henry Clay, Daniel Webster, Rufus Choate, William Seward, John J. Crittenden, and John Quincy Adams (whose presidency ended prior to the formation of the Whig Party). The Whig base of support was amongst entrepreneurs, professionals, Protestant Christians (particularly Evangelicals), the urban middle class, and nativists.

The party was hostile towards the ideology of "manifest destiny", territorial expansion into Texas and the Southwest, and the Mexican–American War. It disliked presidential power, as exhibited by Andrew Jackson and James K. Polk, and preferred congressional dominance in lawmaking. Members advocated modernization, meritocracy, the rule of law, protections against majority rule, and vigilance against executive tyranny. They favored an economic program known as the American System, which called for a protective tariff, federal subsidies for the construction of infrastructure, and support for a national bank. The party was active in both the Northern and Southern United States and did not take a firm stance on slavery, but Northern Whigs tended to be less supportive than their Democratic counterparts.

Presidential elections were held in the United States from November 1 to December 4, 1844. Democratic nominee James K. Polk narrowly defeated Whig Henry Clay in a close contest turning on the controversial issues of slavery and the annexation of the Republic of Texas. This is the only election in which both major party nominees served as Speaker of the House at one point, and the first in which neither candidate held elective office at the time.

President John Tyler's pursuit of Texas annexation divided both major parties. Annexation would geographically expand American slavery. It also risked war with Mexico while the United States engaged in sensitive possession and boundary negotiations with Great Britain, which controlled Canada, over Oregon. Texas annexation thus posed both domestic and foreign policy risks. Both major parties had wings in the North and the South, but the possibility of the expansion of slavery threatened a sectional split in each party. Expelled by the Whig Party after vetoing key Whig legislation and lacking a firm political base, Tyler hoped to use the annexation of Texas to win the presidency as an independent or at least to have decisive, pro-Texas influence over the election.

The Laurentide ice sheet (LIS) was a massive sheet of ice that covered millions of square miles, including most of Canada and a large portion of the Northern United States, multiple times during the Quaternary glaciation epochs, from 2.58 million years ago to the present.

The last advance covered most of northern North America between c. 95,000 and c. 20,000 years before the present day and, among other geomorphological effects, gouged out the five Great Lakes and the hosts of smaller lakes of the Canadian Shield. These lakes extend from the eastern Northwest Territories, through most of northern Canada, and the upper Midwestern United States (Minnesota, Wisconsin, and Michigan) to the Finger Lakes, through Lake Champlain and Lake George areas of New York, across the northern Appalachians into and through all of New England and Nova Scotia.

The Homestead Acts were several laws in the United States by which an applicant could acquire ownership of government land or the public domain, typically called a homestead. In all, more than 160 million acres (650 thousand km; 250 thousand sq mi) of public land, or nearly 10 percent of the total area of the United States, were given away free to 1.6 million homesteaders; most of the homesteads were west of the Mississippi River.

An extension of the homestead principle in law, the Homestead Acts were an expression of the Free Soil policy of Northerners who wanted individual farmers to own and operate their own farms, as opposed to Southern slave owners who wanted to buy up large tracts of land and use slave labor, thereby shutting out free white farmers.

The Republican Party, also known as the Grand Old Party (GOP), is one of the two major political parties in the United States. It is the second-oldest extant political party in the United States after its main political rival, the Democratic Party. In 1854, the Republican Party emerged to combat the expansion of slavery into western territories after the passing of the Kansas–Nebraska Act. The early Republican Party consisted of northern Protestants, factory workers, professionals, businessmen, prosperous farmers, and after the Civil War also of black former juivu. The party had very little support from white Southerners at the time, who predominantly backed the Democratic Party in the Solid South, and from Irish and German Catholics, who made up a major Democratic voting bloc. While both parties adopted pro-business policies in the 19th century, the early GOP was distinguished by its support for the national banking system, the gold standard, railroads, and high tariffs. The party opposed the expansion of slavery before 1861 and led the fight to dismantle the Confederate States of America (1861–1865). While the Republican Party had almost no presence in the Southern United States at its inception, it was very successful in the Northern United States, where by 1858 it had enlisted former Whigs and former Free Soil Democrats to form majorities in nearly every Northern state.

With the election of its first president, Abraham Lincoln, in 1860, the party's success in guiding the Union to victory in the Civil War, and the party's role in the abolition of slavery, the Republican Party largely dominated the national political scene until 1932. In 1912, former Republican president Theodore Roosevelt formed the Progressive Party after being rejected by the GOP and ran unsuccessfully as a third-party presidential candidate calling for social reforms. The GOP lost its congressional majorities during the Great Depression (1929–1940); under President Franklin D. Roosevelt, the Democrats formed a winning New Deal coalition that was dominant from 1932 through 1964.

In the United States, evangelicalism is a movement among Protestant Christians who believe in the necessity of being born again, emphasize the importance of evangelism, and affirm traditional Protestant teachings on the authority as well as the historicity of the Bible. Comprising nearly a quarter of the U.S. population, evangelicals are a diverse group drawn from a variety of backgrounds, including nondenominational churches, Pentecostal, Baptist, Reformed, Methodist, Mennonite, Plymouth Brethren, and Quaker.

Evangelicalism has played an important role in shaping American religion and culture. The First Great Awakening of the 18th century marked the rise of evangelical religion in colonial America. As the revival spread throughout the Thirteen Colonies, evangelicalism united Americans around a common faith. The Second Great Awakening of the early 19th century led to what historian Martin Marty calls the "Evangelical Empire", a period in which evangelicals dominated U.S. cultural institutions, including schools and universities. Evangelicals of this era in the northern United States were strong advocates of reform. They were involved in the temperance movement and supported the abolition of slavery, in addition to working toward education and criminal justice reform. In the southern United States, evangelicals split from their northern counterparts on the issue of slavery, establishing new denominations that opposed abolition and defended the practice of racial slavery upon which the South's expanding cash-crops-for-export agricultural economy was built. During the Civil War, each side confidently preached in support of its own cause using Bible verses and Evangelical arguments, which exposed a deep theological conflict that had been brewing for decades and would continue long after Lee's surrender at Appomattox.