The Bronze Age, roughly 3300 to 1200 BC in western Eurasia, is when most of the ancestry structure of living Europeans and West Asians was set. Steppe herders spread out of the Pontic-Caspian region after 3000 BC, Beaker groups replaced most of Britain's Neolithic population, the Aegean palaces rose on a farmer base, and the Canaanite cities of the Levant took their genetic shape. Carrying a Bronze Age layer is a statement about descent and nothing else; it does not make anyone a Yamnaya or a Mycenaean.
The articles trace Yamnaya ancestry to Caucasus-Lower Volga and Dnipro-Don populations, explain what a steppe percentage measures and how to estimate one with qpAdm or Global25, follow a 30-genome transect of southwestern England through the Beaker turnover and the reuse of older monuments, read 102 prehistoric Aegean genomes for migration and cousin unions, present the Canaanite source built from Megiddo and Hazor, and describe the genetically isolated Tarim Basin mummies who adopted dairy and crops from their neighbours.
Model a genome against Bronze Age sources