Verb
(intransitive) To vacillate.
(dated, intransitive) To turn round entirely to the opposite point.
Source: en.wiktionary.orgWe have had a profound paradigm shift about the Whole Earth. We know it now as a jewel in space, a fragile water planet. And we have seen that it has no natural borders. It is not the globe of our school days with its many-colored nations. Marilyn Ferguson