The use of women, children and immigrant allowed industrialists and factory owners to keep wages low for native born men. This was an important catalyst for the organization of labor unions, Children often worked long hours for low pay. The same was true of women and immigrants.
Based on the order of occurrence, the government used by rome during its history is :
1. Monarchy ( 753 - 509 BC)
2. Republic (509 - 27 BC)
3. Oligarchy (27 BC - 476 AD)
4. Dictatorship
hope this helps
8 Years From 2009 to 2017
About 46,000-51,000 people died.