It ran resources place to place way faster than horse and buggy.
You could say that he appealed to pathos. It's an appeal to emotion while ethos is to credibility. He used pathos to speak about sad things like secession and about the evils of slavery and why it should end. He didn't have to appeal to credibility because he was already the president so everyone knew why he was competent.
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If there had been no Ancient Greek civilization we'd be behind in literature, art, technology, science and much more. The Greek gave the world new ideas and an individual right in self government. The world right now would probably be in the 1619 A.D not 2019 A.D.
An independent executive agency.