Which side do you think had the best long term chances for victory at the start of the civil war?

At the start of the Civil War, the Union likely had the best long-term chances for victory due to its substantial advantages in industrial capacity, railway infrastructure, and a larger population. The Union's ability to produce weapons and supplies far outstripped that of the Confederacy, which faced challenges in resource allocation and logistics. Additionally, the Union's naval supremacy allowed for blockades that restricted Southern trade and access to resources. While the Confederacy had strong military leadership and a motivated populace, these factors alone were not enough to overcome the Union's significant advantages over time.