What Actually Held Ancient Humans Back for 300,000 Years?

What Actually Held Ancient Humans Back for 300,000 Years? Ancient humans had brains like ours 300,000 years ago, yet farms, cities and writing appeared only in the last 10,000 years. We follow the evidence from African caves to Greenland's ice to find out why human progress took so long to take off. All research and sources are linked below. 📚 RESEARCH & SOURCES: ▸ Jebel Irhoud — "New fossils from Jebel Irhoud, Morocco and the pan-African origin of Homo sapiens" (2017, Nature) https://doi.org/10.1038/nature22336 — 315,000-year-old fossils with modern faces but older-shaped braincases. ▸ Blombos drawing — "An abstract drawing from the 73,000-year-old levels at Blombos Cave, South Africa" (2018, Nature) https://doi.org/10.1038/s41586-018-0514-3 — a crosshatch drawn in ochre crayon, the oldest known drawing. ▸ Sibudu bows — "Indications of bow and stone-tipped arrow use 64 000 years ago in KwaZulu-Natal, South Africa" (2010, Antiquity) https://doi.org/10.1017/S0003598X00100134 — bow-and-arrow hunting 64,000 years ago. ▸ Tasmania's lost skills — "Demography and Cultural Evolution: How Adaptive Cultural Processes Can Produce Maladaptive Losses—The Tasmanian Case" (2004, American Antiquity) https://doi.org/10.2307/4128416 — isolated Tasmanians lost bone tools, nets and warm clothing. ▸ Climate and farming — "Was Agriculture Impossible during the Pleistocene but Mandatory during the Holocene? A Climate Change Hypothesis" (2001, American Antiquity) https://doi.org/10.2307/2694241 — Ice Age climate was dry, low in CO2 and too unstable to farm. ▸ A calmer planet — "Global patterns of declining temperature variability from the Last Glacial Maximum to the Holocene" (2018, Nature) https://doi.org/10.1038/nature25454 — global temperature swings shrank fourfold after the Ice Age. ▸ First granaries — "Evidence for food storage and predomestication granaries 11,000 years ago in the Jordan Valley" (2009, PNAS) https://doi.org/10.1073/pnas.0812764106 — raised-floor grana