The moment and place that the phenomenon of human government developed is lost in time; however, history does record the formations of early governments. About 5,000 years ago, the first small city-states appeared. By the third to second millenniums BC, some of these had developed into larger governed areas: Sumer, Ancient Egypt, the Indus Valley Civilization, and the Yellow River Civilization.
The development of agriculture and water control projects were a catalyst for the development of governments. For many thousands of years when people were hunter-gatherers and small scale farmers, humans lived in small, non-hierarchical and self-sufficient communities. On occasion a chief of a tribe was elected by various rituals or tests of strength to govern his tribe, sometimes with a group of elder tribesmen as a council. The human ability to precisely communicate abstract, learned information allowed humans to become ever more effective at agriculture, and that allowed for ever increasing population densities. David Christian explains how this resulted in states with laws and governments:
As farming populations gathered in larger and denser communities, interactions between different groups increased and the social pressure rose until, in a striking parallel with star formation, new structures suddenly appeared, together with a new level of complexity. Like stars, cities and states reorganize and energize the smaller objects within their gravitational field.
— David Christian, p. 245, Maps of Time
Starting at the end of the 17th century, the prevalence of republican forms of government grew. The Glorious Revolution in England, the American Revolution, and the French Revolution contributed to the growth of representative forms of government. The Soviet Union was the first large country to have a Communist government. Since the fall of the Berlin Wall, liberal democracy has become an even more prevalent form of government.
In the nineteenth and twentieth century, there was a significant increase in the size and scale of government at the national level. This included the regulation of corporations and the development of the welfare state.