gun powder
<span>Janissaries</span> were loyal soldiers trained to use small arms. They were regarded the most loyal of the sultan troops, and were also highly trained and disciplined. These disciplined forces were unlike the disorganized soldiers of Anatolia who also did not have gunpowder reserves.
Depends on the country, for example the UK Prime Minister is elected by the public.
Hope this helps.
Sparta had what is known as a diarchical monarchy. The government's complete makeup consisted of dual kings; a council of about 30 gerontes or gerousia, which are rich elders; the ephors, a small council of five people and an assembly, called the Appella or Demos, of the common people who gathered once a month. The ephors were voted in yearly and this group held a lot of power. The ephors had the power to put the kings on trial and possibly impeach him if found guilty. This small council of five served as a type of supreme court. There were two members of the ephors always with the kings on military campaigns to help keep an eye on the interests of the state.
I would say the Hittites and the Celts. The Hittites thrived and disbanded before the beginnings of the Roman empire. The Celts were absorbed by the Romans but were keen to follow their ways.