hellenism(n = noun.cognition) - the principles and ideals associated with classical Greek civilization;
is a kind of principle
Derived forms adjective hellenistic₁, adjective hellenistical₁

1.  A phrase or form of speech in accordance with genius and construction or idioms of the Greek language; a Grecism. Addison. [1913 Webster]

2.  The type of character of the ancient Greeks, who aimed at culture, grace, and amenity, as the chief elements in human well-being and perfection. [1913 Webster]

hellenism, n.
1 Greek character or culture (esp. of ancient Greece).
2 the study or imitation of Greek culture.

Derivative:
Hellenize v.tr. & intr. (also -ise). Hellenization n.

Etymology:
Gk hellenismos f. hellenizo speak Greek, make Greek (as HELLENE)