People could not buy food or trade goods any more.
The telegraph
Samuel Morse sent the first telegraph message from Washington DC to Baltimore in 1844. The message he sent said, "What hath God wrought?"
Within a decade, thousands of miles of telegraph cable lines were in use all over the United States, and then by the 1860s a transatlantic cable connected the USA to Europe for communication.
Back then, people believe that obelisk provide some sort of magical protection for Sacred Places ( Such as Temples).
We could almost find obelisks in every Temples that bult in ancient Egypt Period. Hope this helps
Other than the fact that the U.S. economy subsisted on agriculture during the early 19th century, there were expansions that would make the agricultural field even bloom with more opportunities. This included the construction of canals and steamboats. This lead to a boost in the agricultural indistry. Other than that, the poorer regions had to rely on growing their own food and selling their produce for money in order to survive. Because of these two factors, agriculture was the leading occupation during the 1800s.