Leaders are either heads of state or heads of government, depending on that is constitutionally the Main government on the nation's government. The rise of agriculture began to alter that state of affairs. During the land of Sumer (in what's now Iraq) the creation of irrigation necessitated grander arrangements. Charge https://governmentinsulationscheme.water.blog/2025/06/19/empower-your-homes-efficiency-explore-the-eco4-grant-revolution/