What effect does investing in physical and human capital have on a country's GDP?

Wich part of the declaration of independence acts as an implied plan of action in that it lists laws and practices to be changed

What from the columbian exchange had perhaps the biggest impact on the world?

In 1816, john c. calhoun proposed that: a. that the federal government aid in the construction of roads and canals to improve transportation to and from the west b. the united states should end slavery. c. the united states should increasing the size of the navy and invade central america. d. the united states should annex hawaii