Why would it be difficult to rule alexander the greats empire

Why was frederick douglass encouraged by the dred scott decision?

What was the social class pyramid during the civil war?

Aresearcher is studying women recently admitted to a state prison. all potential subjects must have children under the age of five. research subjects will be given a basket of toys to use at their children’s first visit that the children can then take home. in assessing this proposal, the irb needs to determine that the toys are: age appropriate. not an excessive incentive. educational. of high quality.