Complex sentence: However, this was not a movement that aimed at independence, arguing for the devolution of Scottish business to Edinburgh to make Westminster more efficient and it was taken for granted that the union was vital to the progress and improvement of Scotland.
Split into simpler sentences: However, this was not a movement that aimed at independence. It argued for the devolution of Scottish business to Edinburgh to make Westminster more efficient and it was taken for granted that the union was vital to the progress and improvement of Scotland.