What did the effects of the inventions of Samuel B. Morse and Alexander Graham Bell have in common?
They enabled people to communicate immediately across great distances.
Samuel B. Morse created Morse Code, used via the telegraph. Any two points with access to a telegraph office suddenly had the ability to send and receive messages within minutes, instead of relying on the mail services.
Alexander Graham Bell invented the telephone, enabling verbal communication between distant points via the telephone. The first Morse Code telegraphs were sent in 1837, although earlier systems had been in place since the late 1700s. The earliest telephones were in place in 1876.
These may seem like unimportant achievements, but many wars could have been ended several weeks earlier had the combatants known the conflicts had been settled via treaties.