"It was people who cared more for their own wealth than anything else that started the war."

Such people have started a great many wars throughout history, including, I think, a few very recent ones that we've seen in the last couple of decades.

It's quite correct that the Civil War was started in the interests of the rich elites....and fought, tragically, by the ordinary people. The vast majority of White southerners were not slave owners, they were mostly small farmers, labourers, shopkeepers, and such. They had little or no vested interest in maintaining the institution of slavery. They went out to fight primarily just to defend their own familiar home ground against "the Yankees", as people everywhere normally do when the land they live on appears to be threatened with an imminent invasion. They were used as cannon fodder by the rich slave-owning elite in the South to protect the interests of that elite, and they died by the hundreds of thousands in a fight that was not really in their own interests at all....just like most of the Germans who died at Hitler's behest. It was their natural spirit of patriotism that enabled ruling elites to send them off to war. The same thing happens now, in much the same way. Ordinary people are sent off to war by the rich and powerful, who tell them that the homeland is in danger, and they must rush out to DEFEND it. The rich and powerful stay home and issue the orders. The ordinary people kill and get killed by a similar group of ordinary people who are serving on the other side...for very similar reasons. Patriotism. Duty. Honour. And freedom. There's never been a side in war that didn't think it was fighting to protect its freedom. After all, that's what their leaders tell them.