Leaders Are either heads of state or heads of government, based on that's constitutionally the chief govt from the country's government. The rise of agriculture started to vary that state of affairs. In the land of Sumer (in what is now Iraq) the invention of irrigation necessitated grander arrangements. Charge https://homeinsulationgrant.politics.blog/2025/06/19/smarter-living-starts-at-home-tap-into-energy-efficiency-grants/