Ethos uses emotional appeal
The best option regarding a motive that Abraham Lincoln had when he delivered the Gettysburg Address would be that "<span>He wanted to drum up enthusiasm for his recently signed Emancipation Proclamation," although it was far more about reconciling the North and the South. </span>
The Stock market crash of 1929 was indeed the cause of the Depression, as the market crash put Wall Street in panic. Millions of the Stock investors lose it all. The lack of confidence in the situation ceased consumer spending; this resulted in massive layoffs of workers.
The garrisons were an anti slavery group who helped free other slaves