1
general::
Phrase(s): come full circle
Fig. to return to the original position or state of affairs. • The family sold the house generations ago, but things have come full circle and one of their descendants lives there now.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Also, go full circle. Complete an entire cycle; return to the original position or condition. For example, After a whole year of debate we have come full circle on this issue. Shakespeare may have originated this expression in King Lear (5:3): "The wheel is come full circle." A 20th-century idiom with a similar meaning is what goes around comes around, as in I knew if I helped her now, she would help me later? what goes around comes around., see FULL CIRCLE.
American Heritage Idioms