Philosophers were individuals who developed systems of ideas about reality. Most beings in the galaxy assumed that all Ithorians were peaceful gardeners who engaged in contemplative philosophy. Sio Bibble, the Governor of Naboo under Queen Amidala, was a philosopher. Sistros was one of the four ancient Four Sages of Dwartii. According to Grand Admiral Thrawn of the Imperial Navy, it was important to understand an enemy's philosophy to defeat them.