If earth was not a connecting system then the heat from its interior wouldn’t have effect on the tectonic plate at all. The heat from the interior causes the tectonic plates to shift, which effects the oceans sea floor and does cause volcanos to be created.
Abraham Lincoln adressed the American people with a speech that, as a side fact, is one of the most quoted speeches in the history of the U.S.
Over the years scholars have analyzed the speech, and they suggest that Lincoln used extreme care with his words. He wanted to deliver a heartfelt and precise message in moments of extreme national crisis. The magnitude of the battle in Gettysburg stunned the whole nation, and the dedication of a cementery at the site of the Civil War's most pivotal battle was seen as a solemn event, that empathized with the whole nation.
He placed this battle within the larger context of the American history, by making reference 87 years before to it's foundation. Lincoln sought to transform America by making an attempt at redefining liberty and nationalism by fusing the two together. Lincoln forever changed the way we think about the country.
I think because he has very little energy remaining and has been out in the cold for too long.