Explain the historical development of the Aztecs.

Throughout the late 1300s and early 1400s, the Aztecs began to grow in political power. In 1428, the Aztec ruler Itzcoatl formed alliances with the nearby cities of Tlacopan and Texcoco, creating the Triple Alliance that ruled until the coming of the Spanish in 1519.

i think its the outcome of people's preferences.

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.