What were some of the reasons that southern states gave for seceding in 1861?

Southern states seceded in 1861 primarily to preserve their economic interests, particularly the institution of slavery, which they believed was essential for their agrarian economy. They argued that states had the right to govern themselves and felt that the federal government was overstepping its authority, particularly with the election of Abraham Lincoln, whom they viewed as a threat to their way of life. Additionally, they sought to protect their cultural identity and autonomy from what they perceived as northern aggression and interference.