A letter is a physical, written message that one person sends to another person (or group of people), often by mail. [1]
Ancient rulers of nations were probably the first people to send and receive letters.[1] The practice of letter-writing eventually spread to include those who were not leaders of nations.[2]
Since the late 20th century, letter-writing has decreased because new forms of electronic communication have been created, including computers and telephones. However, many people still send letters, such as for business purposes.[1][3]
Since the late 20th century, scholars have begun to spend more time studying the practice of letter-writing academically.[2]