How are conventional sewer systems and Toilets of the future different

What might be something all americans believe in that unite us as a nation ?

The system of checks and balances was designed for what purpose? fear of strong state power to keep power out of one branch to appease the southern states to allow the judicial branch to have equal power

Unique among the rulers of this time, persian emperors installed governors in their provinces tolerated local cultures and laws wielded absolute power maintained an extensive army