In 451 or 450 Pericles carried a law confining Athenian citizenship to those of Athenian parentage on both sides. No source provides any background to this proposal; it is not even clear whether it was retrospective.
A high school diploma or GED is enough to get started as an office clerk. It is important to have some office skills, such as typing, good phone skills, word processing, etc. Most training is done on the job.
Postal Service Clerks sort, distribute, and deliver mail as well as help customers with an array of other mail services including the purchase of stamps and money orders and weighing boxes and packages. Clerks collect fees for postage and obtain signed receipts, registered mail and other special tasks. A high school diploma is needed to work as a Postal Service Clerk, as well as additional testing and on-the-job training.