What was Thomas Jefferson’s greatest contribution to westward expansion and how did it affect the US

Thomas Jefferson acquired an interest in western exploration early in life. ... While president, Jefferson successfully acquired the Louisiana Territory from France in 1803 and sent the Lewis and Clark Expedition (1803–1806) on a mapping and scientific exploration up the Missouri River to the Pacific.

That westward expansion was greatly aided by the completion of the Transcontinental Railroad in 1869, and passage of the Homestead Act in 1862.

In the mid-19th century, the quest for control of the West led to the annexation of Texas and the Mexican–American War. ... This expansion led to debates about the fate of slavery in the West, increasing tensions between the North and South that ultimately led to the collapse of American democracy and a brutal civil war.

Explanation:

yes.

an illinois concealed carry license (ccl) is required to conceal carry a firearm in illinois. the license permits the licensee to carry a concealed loaded or unloaded handgun on his or her person or within a vehicle.

in moral and political philosophy, the social contract is a theory or model that originated during the age of enlightenment and usually concerns the legitimacy of the authority of the state over the individual.

explanation:

the influence of charles louis de secondant , baton montesquieu.