Back when slaves were still a part of life they would be tagged as "property" and as you probably know they were not free so just say that "slaves were non free men women and children being forced to work or do labor because they are only property
When citizens are unhappy with a specific piece of legislation they want removed or struck down, they can call a referendum, which puts the issue to a direct vote by the citizens.
Yeah like the question said they were competing for resources there wasn’t much of land so they were pretty much fighting each other for more land because land equals power in every historical instance.