A. The excerpt was produced in the 17th century during the colonization of the Americas.
B. The argument made in the excerpt is that Christians have a right to settle in the lands of Native Americans because they have no title or property to the land due to their lack of enclosing it, despite the fact that they already possess the land.
C. The historical effect of the development described in the excerpt was the displacement of Native Americans from their ancestral lands and the emergence of private property, which led to more structured political systems like governments based on land ownership.