Africa is a continent with many different countries and different governments. Most have a Republic form of government (for example: Egypt, South Africa). Lesotho and Morocco are kingdoms. Several are officially Republics but are, in-fact, dictatorships (for example: Uganda). Somalia is officially a Republic, but much of the country is still actually controlled by warlords. Libya officially has an elected government but is actually mostly under the control of warring tribes and Islamist terrorist groups aligned with ISIS.
The type of government ancient Africa used to have was an empire which is a type of monarchy.
Many early African kingdoms collapsed because of inter-tribal fighting over leadership.
Upper Egypt and Lower Egypt
gold
The greatest threat to the kingdoms was from defeat in war. Most of the early kingdoms did not survive, as those that did survive destroyed the others.
Japan was not a unified country in its early days. There were multiple kingdoms whose enemies were the other kingdoms.
Organized government existed on the island of Crete as early as 3,000 BC. If your question is about the start of 'democratic' government in Greece - more specifically, Athens - , the answer is around 500 BC.
The federal system formed the basis of Ethiopian government and society.
Assuming "early humans" refers to those who existed in "prehistory" or before written history, they did not require government. Instead, societies existed in tribes or bands, following the directives of the eldest members. Eventually, societies became too big for this to work and government took the form of kingship. Democratic governments, have only existed as we know them for about 220 years, though the idea for it is older.
through trade
The early Germanic kingdoms were characterized by decentralized political structures with a strong emphasis on kinship ties and warrior-based societies. They often engaged in raiding, warfare, and inter-tribal conflicts, which played a central role in their social and political organization. The kingdoms were often fluid and subject to frequent changes in leadership and territorial boundaries.
inthe early 1900s
Ok so first when they tried preaching their religion, the African leader shunned them. But then they got invaded by them. Which then their first leader was Mansa-Musa! 🙉 I'm smart! Jk