There were actually four HUGE causes for WW1, treaties and alliances brought many countries into war, the imperialism of some countries scared other countries, and they were "defending" themselves, there was a lot of weapons stocking, and countries were creating gigantic armies, and that threatened other countries, and then we have plain old nationalism.
Cosmologists :)
Oceanographers study the ocean, meteorologists study the weather and geologists study rocks.
Explanation:
Abilities. Tyche possesses the standard powers of a goddess. Tychokinesis: As the Goddess of Luck, Fortune and Chance, Tyche has absolute control and divine authority over luck. If a person receives too much good luck, Nemesis will provide them with bad luck to balance it.