Zarathustra was able to simplify the Esoteric Sciences that would become Philosophy in 700 BCE. 

Cyrus The Great became a huge supporter of Zarathustra and he worked to spread Zarathustra’s Work throughout all of the World (except the Americas and Australia, of course).

Confucius was trained directly by the Cyrus-Zarathustra Campaign. 

The Vedic Texts were composed from the Cyrus-Zarathustra Campaign. 

Philosophy was developed by Pythagoras who was trained under the the Cyrus-Zarathustra Campaign. 

The Druids and Bards were formed from the Cyrus-Zarathustra Campaign. 

Hypothesis : the only record we have of Old Norse came to us from Snorri Sturluson in the 12th Century CE so this can only be hypothesis…

Was Old Norse influenced by the Cyrus-Zarathustra Campaign via their exposure through Ireland and Greece? 

The Romani People show similarities to the Cyrus-Zarathustra Campaign. More research is needed.

By 400 BCE, the Cyrus-Zarathustra Campaign has successful passed on the Esoteric Sciences that would go on to introduce Magical Arts to the World.