Why did ancient Greece go from the eighth century to the first century?

Ancient Greece is located in the eastern Mediterranean, and its geographical scope includes the Greek Peninsula, Aegean Islands, ionian islands and the western coast of Asia Minor Peninsula. Aegean civilization is the earliest civilization in Greece. It is the collective name of bronze civilization in Aegean Sea and its surrounding areas, and its centers are successively in Crete and Mycenae. Around 2000 BC, the earliest country appeared in Crete. There have been human activities in the Aegean region of Greece for a long time. Early human skulls were found in Cassidis, northern Greece, and some scholars think they belong to the Nepalese type. Paleolithic cultural relics are scattered in the Greek peninsula. In the Frankti Cave in Argolis, southern Greece, there is a Mesolithic site about 7000 BC. Residents use stone tools made of obsidian to catch marine fish. Neolithic settlements are distributed in Greece and Aegean Islands, which can be traced back as early as 6000 BC. The famous sites are Neonikedia, Thessalyskro and Crete Knossos in Macedonia. The lifestyle of residents in the Neolithic period was roughly the same. They grow crops such as barley, wheat and beans, domesticate domestic animals such as sheep and goats, and worship clay sculptures symbolizing high yield. Agricultural technology probably came from West Asia by land and sea through Xiaoya Peninsula, and may be accompanied by agricultural immigrants. It is worth noting that there is a lack of hard flint in Greece. Most residents of Neolithic culture use obsidian to make sharp-edged stone tools, while obsidian is only produced in Milos Island, cyclades. This shows that at least in 6000-7000 BC, the Aegean Sea began to exchange needed goods. In 3000 BC, the Aegean region entered the Bronze Age, and slave countries appeared. The use of bronzes led to the emergence of magnificent buildings in Crete civilization at that time, and the ruins of Knossos Palace unearthed in the19th century were typical buildings at that time. Crete script is generally called Eteocretan ("Primitive Crete"), and it may be written in linear script A that has not been cracked. In later cultures, due to the invasion of Mycenae civilization, they turned to linear letter B, an early Greek letter, to keep records. About 1200 BC, another Greek (Dorian) invaded Mycenae civilization. After 300 years, Greece was completely silent, closed and poor, and Greek history entered the so-called "dark age". Because the understanding of this period mainly comes from Homer's epic, it is also called Homer's era. At the end of Homer's era, ironware became popular, replacing bronze ware. Maritime trade has also been re-developed, and new city-states have been established. The Greeks created their own characters with Phoenician letters, and held the first Olympic Games in 776 BC. The Olympic Games also marked the prosperous period of ancient Greek civilization. About 750 years ago, with the increase of population, the Greeks began to colonize abroad. In the following 250 years, new Greek city-states spread all over the Mediterranean coast, including Asia Minor and North Africa. Among these cities, Sparta and Athens are the most powerful.