If your question is just "why should people study the Civil War?" It is part of history, and shows how the US thought about slavery, and how it shaped our communities, thoughts, etc. Some Northern people wanted to end slavery, others wanted too keep the US from splitting in 2, and the Southerns wanted to keep slavery, and if they couldnt keep it becuz the Northern states didnt allow it, they would just leave. Sorry if it is kinda confuing