Comment: To govern is:

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To govern is:

"late 13c., from Old French governer (11c., Modern French gouverner) "govern," from Latin gubernare "to direct, rule, guide, govern" (cf. Spanish gobernar, Italian governare), originally "to steer," a nautical borrowing from Greek kybernan "to steer or pilot a ship, direct" (the root of cybernetics). The -k- to -g- sound shift is perhaps via the medium of Etruscan. Related: Governed; governing."
http://www.etymonline.com/index.php?allowed_in_frame=0&searc...

Every entity that makes choices requires a governing ability. The faculty which governs the entity can be said to be the entitity's government. In the case of a rational human being alone on an island, his mind is his government. Without the ability to "direct, rule" and "guide" his body he will perish.

The smallest, most powerful and most important government in existence is your own mind.