Mineral rights owners usually exercise their rights to extract oil and natural gas. If you own real estate, you need to understand the concept of mineral rights and how their ownership can impact your property. The website Geology notes that the United States is one of few countries that allow private individuals to own minerals rights.
Lincoln was morally opposed to slavery and politically opposed to any expansion of it. On October 16, 1854, in his  Peoria Speech , Lincoln declared his opposition to slavery, which he repeated in his route to presidency.
Lincoln saw this as a repeal of the 1820 Missouri Compromise which had outlawed slavery above the 36-30' parallel. During the Civil War, Lincoln used the war powers of the presidency to issue the Emancipation Proclamation, in January 1863.