Short answers, pulled from the story.
Horace Greeley was an American newspaper editor and publisher who founded and edited the New-York Tribune. He was born on the 3rd of February 1811 and died on the 29th of November 1872. He helped found the Republican Party and ran for president in 1872.
Horace Greeley founded the New-York Tribune, publishing its first issue on the 10th of April 1841. It became the highest-circulating newspaper in the country through weekly editions sent by mail, reaching 300,000 subscribers by 1858.
Horace Greeley popularized the slogan "Go West, young man, and grow up with the country." He urged the unemployed of the cities to settle the developing American West, seeing it as a land of opportunity for the young and the unemployed.
Horace Greeley lost the 1872 presidential election in a landslide to incumbent Ulysses S. Grant. He received 2,834,125 votes to Grant's 3,597,132 and carried only six states: Georgia, Kentucky, Maryland, Missouri, Tennessee, and Texas.
Horace Greeley died on the 29th of November 1872 at Choate House, an asylum at Pleasantville, New York. His death came before the Electoral College balloted, and it followed the death of his wife Mary on the 30th of October, a week before the election.
Horace Greeley promoted radical reforms including socialism, vegetarianism, agrarianism, feminism, and temperance. He subscribed to the Fourierist ideas of shared-profit settlements called phalanxes, rarely ate meat, and opposed the consumption of alcohol.
Horace Greeley befriended Abraham Lincoln when both served in the House as Whigs. During the Civil War he mostly supported Lincoln but pressed him toward emancipation, notably in the August 1862 open letter "The Prayer of Twenty Millions."