http://nuclearcdboxafziza4mgohcwhzfjiyg6zeslnry33pepsgtur2wyeyd.onion/social/3.html
Even if we just think about just the mesolithic age, 1500-5000 bc, we still had fairly complex societies and structures.
Thats 10,000 years of politics, intrigue, war, technological discovery and growth. Which by itself is twice as long as recorded history, but then the first evidence of tool use was 3.3million years ago, and our near ancestors were almost as smart as we are.