Judaism does not have a centralized leadership.
A company's hierarchy affects how goals and strategies are pursued because of leadership. With a wide hierarchy, an organization gives more freedom and empowerment to their employees, allowing them to be more creative.
A citizen assembly, a council of elders, and a dual kingship which provided religious and war leadership.
Patriarchs-Archbiships-Bishops-priests-laity
Israel
Jerusalem
Rabbis and cantors
The is no such thing as a "judaism".
Of course not.
The most important form of leadership on Iran is the Islamic hierarchy that has the final say over government activities. The top religious ruler in Iran has the title of Ayatollah.
Belief in God and in the Torah.
Jews worship in synagogues.