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.
How to Become a Bookkeeping, Accounting, or Auditing Clerk. Most bookkeeping, accounting, and auditing clerks need some postsecondary education and also learn some of their skills on the job. They must have basic math and computer skills, including knowledge of spreadsheets and bookkeeping software.