[manquer]

Money/economy was certainly a big reason.

Back in 1860s, cotton and other plantation heavy industries where very lucrative, the southern states were very wealthy enough to be able to field a big army for years, while they lacked strong industry to support an extended campaign.

Also manifest destiny and especially Monroe doctorine all pre dated the civil war, there was certainly strong idealogoical belief on who the continent was for.

[DaftDank]

The south's money/economy was dependent upon slavery, that is true. But every single southern state listed the right to own slaves as one of their reasons for secession.

https://www.battlefields.org/learn/primary-sources/declarati...

[Ancapistani]

Your link lists five states - there were eleven in the Confederacy. While I believe most did list slavery as cause of action either directly or obliquely, not all did.

Here is a transcript of Arkansas’s Ordinance of Secession: https://digitalheritage.arkansas.gov/cgi/viewcontent.cgi?fil...

Note that there is no mention of slavery.

[ultraluminous]

Arkansas was one of the last states to seceded the union. The very second sentence in the ordinance linked is "In addition to the well-founded causes of complaint set forth by this convention in resolutions adopted". You are more than welcome to look up those "causes and complaints" and let me know whether they are slavery related or not.

[Ancapistani]

While I don’t have time to do that right now, I will make a point to do so. I’m curious now, and haven’t enumerated all of the resolutions before.

I have read a ton of contemporary writings by the various politicians who signed Arkansas’s OoS, and with a couple of exceptions the vast majority claimed at the time to have supported secession in response to the military actions of the Union. There were relatively few slaveholders in the state at the time, and they were largely concentrated in the Delta, along the border with Mississippi.