According to Pericles, Athens is not an “isolationist” city. A statement from a speech that the Athenian leader gave to honor soldiers who died in a war with Sparta reads:
"We throw open our city to the world, and never pass laws to exclude foreigners from any opportunity of learning or observing, although the eyes of the enemy may occasionally profit from our liberality..."
That statement contradicts the ideology of isolationism which is abstaining from political, military, or economic alliances or agreements with other countries.
The so-called golden age of Athenian culture flourished under the leadership of Pericles (495-429 B.C.), a brilliant general, orator, patron of the arts and politician—”the first citizen” of democratic Athens, according to the historian Thucydides.
Pericles transformed his city’s alliances into an empire and graced its Acropolis with the famous Parthenon. His policies and strategies also set the stage for the devastating Peloponnesian War, which would embroil all Greece in the decades following his death. Read more at History.com.