To promote equality for women
Marius's election as a consul made the most sweeping changes to the Roman army. They were known as the Marian Reforms. Shortly after his election, he increased the numbers of the active army as he was concerned about a Barbarian invasion. Marius relaxed the strict recruitment policies. Until then, a Roman soldier had to provide his own uniform and weapons, own land and be of a certain social class and a Roman citizen. Marius allowed all Roman citizens to join the army irrespective of what social class they were. They also did not have to own land.
Much more mixed cultures eg brazil. industrilisation of most cultures who used slavery through cheap labour that benifited the society eg russia but also at a great cost usually death disease and social unrest
C. especially the North since they had the most resources, and more people they thought the South would easily lose.
