You just described most of the ancient world.
dictatorship
The kings, then the Tyrants. See the list Greek Tyrants in the separate panel Sources and related links: below.
the ruler has seized his power by force
Tyrant
Zeus was the ruler of the Greek Gods and Kronos was the ruler of the Titans.
Zeus is not an emotion, he is a Greek god, ruler of the Olympians and father of Gods and men.
If you mean 'dethrone'. It means to remove, usually by force, a ruler from power.
Zeus is the king and ruler of the Greek gods.
monarchy
He was elected for chancellor and when the president died Hitler siezed the opertunity and merged Chancellor and president into one.
The Ancient Greek Bad Ruler Was Alexander The Great I Think.
Zeus is the king and ruler of the Greek gods.