They wanted to create an antislavery majority there
<span>B. white miners settled on Indian land in Colorado. - The miners were coming for the Pike Peak's Gold Rush and the US government did nothing to stop them from settling on the land.
Hope that helps.</span>
But in modern times, as we see, Wakanda is a thriving, flourishing civilization with few conflicts with the outside world. So the primary function of challenge day is keeping the peace internally, with making sure the Black Panther is a fit protector now a secondary outcome. And there for it was kept a hidden for a while.
Regulatory economics is the economics of regulation. It is the application of law by government or independent administrative agencies for various purposes, including remedying market failure, protecting the environment, centrally-planning an economy, enriching well-connected firms, or benefiting politicians.