Short answers, pulled from the story.
The Etruscans called themselves Rasenna, meaning the people, while ancient Greeks and Romans knew them as the Tyrrhenians. Modern archaeogenetics confirms they were an indigenous population who developed locally from the Iron Age Villanovan culture around 900 BC. They dominated central Italy, covering what is now Tuscany, western Umbria, and northern Lazio, before eventually falling to the expanding Roman Republic.
The Etruscan civilization flourished from 900 BC to 27 BC, with the earliest evidence of their culture dating to the 9th century BC. Their decline began in the 4th century BC as the Roman Republic expanded its power, and their territory was incorporated into the Roman Empire by 27 BC. The destruction of Veii in 396 BC marked a turning point in their gradual assimilation by Italic, Celtic, and Roman ethnic groups.
The Etruscans lived in central Italy, covering what is now Tuscany, western Umbria, and northern Lazio, and built their cities on high, precipitous hills. A comprehensive study published in September 2021 analyzed the autosomal DNA of 48 Iron Age individuals and confirmed they were autochthonous with a genetic profile strikingly similar to their Latin neighbors. Their DNA showed no trace of recent admixture with Anatolia or the Eastern Mediterranean, proving they were a mixture of Western Hunter-Gatherer, Early European Farmer, and Steppe ancestry.
Etruscan women enjoyed a level of freedom and public participation that baffled and shocked their neighbors in Greece and early Republican Rome. They were allowed to participate in public life, attend banquets, and engage in mixed-sex socializing, behaviors that Greek and Roman authors misinterpreted as sexual promiscuity. Etruscan society was monogamous and emphasized the pairing of married couples, with the mother's side of the family holding significant importance as evidenced by funerary inscriptions.
At the height of their power around 500 BC, the Etruscans formed a loose confederation known as the Etruscan League, or Dodecapolis, consisting of twelve city-states. This alliance was founded by Tarchon and his brother Tyrrhenus, with the league meeting annually at the Fanum Voltumnae, a sacred shrine in Volsinii. The league was primarily economic and religious, allowing the Etruscans to project power across the Italian peninsula and the western Mediterranean before the political balance of power began to shift away from them after 500 BC.
The Etruscan language remains one of the great mysteries of the ancient world as it is an isolate family unrelated to other known language groups. The Etruscans left around 13,000 inscriptions, most of which are short and funerary, but a few significant texts have survived, including the Liber Linteus with around 1400 words and the Clay Tablet of Capua with 62 lines. The oldest written records date to around 700 BC, and the script was written from right to left, though the language itself remains only partly understood.