Over the years, changes in the nation and growth in the federal role in domestic and economic matters has resulted in an increase in the power of

True.

Explanation:

It's true because the idea of the Lost cause was to provide people with a romanticized views about the causes which was responsible for the civil war. Many southern churches perpetuated this myth and created a mythology that  would make it look like the South was defeated with the death of Christ, and the Southerners were sacrificial lambs for the United State's sins.