A pantheon is the particular set of all gods of any individual polytheistic religion, mythology, or tradition. The word, pantheon, derives from Greek πάνθεον pantheon, literally "(a temple) of all gods", "of or common to all gods" from πᾶν pan- "all" and θεός theos "god". Some well-known historical polytheistic pantheons include the Sumerian gods and the Egyptian gods, and the classical-attested pantheon which includes the ancient Greek religion and Roman religion. Post-classical polytheistic religions include Norse Æsir and Vanir, the Yoruba Orisha, the Aztec gods, and many others. A pantheon of gods is a common element of polytheistic societies. A society's pantheon can be considered an aspiring self-reflection of that society: A pantheon is an overview of a given culture's gods and goddesses and reflects not only the society's values but also its sense of itself. A pantheon directed by a thunderbolt wielding autocrat might suggest a patriarchy and the valuing of warrior skills. A pantheon headed by a great-mother goddess could suggest a village-based agricultural society. To confront the pantheon of the Egyptians is to confront a worldview marked by a sense of death and resurrection and the agricultural importance of the cycles of nature. The Greek pantheon is a metaphor for a pragmatic view of life that values art, beauty, and the power of the individual, and that is somewhat skeptical about human nature. Nowadays, most historical polytheistic religions are referred to as "mythology". Scholars such as Jaan Puhvel, J. P. Mallory, and Douglas Q. Adams have reconstructed aspects of the ancient Proto-Indo-European religion, from which the religions of the various Indo-European peoples derive, and that this religion was an essentially naturalist numenistic religion. An example of a religious notion from this shared past is the concept of *dyēus, which is attested in several distinct religious systems. In many civilizations, pantheons tended to grow over time.