Yeah. I should clarify. The north was more economically powerful, but the per-capita income wasn't even close. Southern slavery holders were uber-rich, but what really mattered was control over the federal government.
Southerners had disproportionate voting power, as 3/5 of slaves were counted toward the population needed for representation...
So a slave owners vote was much more powerful, per person. They started passing laws to not allow discussion against slavery in congress, stifling free speech... and other bullshit.
