the "world's first proponent of ecology." The Avesta and other texts call for the protection of water, earth, fire, and air making it, in effect, an ecological religion: "It is not surprising that Mazdaism…is called the first ecological religion. The reverence for Yazatas (divine spirits) emphasizes the preservation of nature (Avesta: Yasnas 1.19, 3.4, 16.9; Yashts 6.3–4, 10.13)." However, this particular assertion is limited to natural forces held as emanations of asha by the fact that early Zoroastrians had a duty to exterminate "evil" species, a dictate no longer followed in modern Zoroastrianism. Zoroastrianism is not entirely uniform in theological and philosophical thought, especially with historical and modern influences having a significant impact on individual and local beliefs, practices, values, and vocabulary, sometimes merging with tradition and in other cases displacing it. The ultimate purpose in the life of a practicing Zoroastrian is to become an ashavan (a master of Asha) and to bring happiness into the world, which contributes to the cosmic battle against evil. The core teachings of Zoroastrianism include: Following the threefold path of Asha: Humata, Hūxta, Huvarshta (). Practicing charity to keep one's soul aligned with Asha and thus with spreading happiness. The spiritual equality and duty of men and women alike. Being good for the sake of goodness and without the hope of reward (see Ashem Vohu). Practices The religion states that active and ethical participation in life through good deeds formed from good thoughts and good words is necessary to ensure happiness and to keep chaos at bay. This active participation is a central element in Zoroaster's concept of free will, and Zoroastrianism as such rejects extreme forms of asceticism and monasticism but historically has allowed for moderate expressions of these concepts. In Zoroastrian tradition, life is a temporary state in which a mortal is expected actively to participate in the continuing battle between Asha and Druj. Prior to its incarnation at the birth of the child, the urvan (soul) of an individual is still united with its fravashi (personal/higher spirit), which has existed since Ahura Mazda created the universe. Prior to the splitting off of the urvan, the fravashi participates in the maintenance of creation led by Ahura Mazda. During the life of a given individual, the fravashi acts as a source of inspiration to perform good actions and as a spiritual protector. The fravashis of ancestors cultural, spiritual, and heroic, associated with