Short answers, pulled from the story.
The oldest surviving legislature in human history convened for the first time in the year 930 on the grassy plains of Thingvellir in Iceland. This assembly, known as the Althing, brought together chieftains and free men to settle disputes, make laws, and choose leaders.
The United Kingdom Parliament operates under a fusion of powers where the executive and legislative branches are deeply intertwined and the Prime Minister is elected from within Parliament. This contrasts with presidential systems where the executive and legislative branches are elected separately and operate independently.
In communist states such as China, the Supreme State Organ of Power is the National People's Congress which holds unified powers encompassing the executive, legislative, judicial, and all other state functions. This system subordinates judicial power to political power and rejects the separation of powers found in liberal democratic systems.
Comparative analysis has found that the size of a country's lower house tends to be proportional to the cube root of its population. This means that as a country's population grows, the size of its legislature increases but much more slowly.
Democratic legislatures perform six major functions: representation, deliberation, legislation, authorizing expenditure, making governments, and oversight. These functions are essential to the operation of a legislature and shape the way laws are made and how governments are held accountable.