this XX an excellent XXXXXXXX XXXX XXXXXXXXXX us XX think XXXXXXXXX about the XXXX "XXXXXXXXXX." in XXXXXXXXX history, we often think of XXXXXXXXXXX XX sudden, violent events — XXX the textbook XXXXXXX revolution XX a *complete XXXXXX* in XXXX XX thinking, working, or living. the agricultural XXXXXXXXXX XXXXXXXXX because XXX *XXX result* XXX a XXXXX transformation of XXXXX existence, XXXX though XXX XXXXXXX XXXXXXXX XXXXXXXXX XXXX X,XXX XX 4,000 years. think XX it XXXX way: no XXXXXX XXXXXX "XXXXXXX" XX become a farmer overnight, XXX XXX cumulative XXXXXX of XXXXXXXXX of XXXXX decisions across XXXX generations XXXXX XX to a change so XXXXX XXXX XXXX XXXXX the XXXXXXXXXX XXX XXXXXX recognizable XXXXXXXX XX XXXX before it. XXX name "revolution" XXXXXXXX the scale of XXX change, not the speed.
**question 2: how did climate change at XXX XXX XX XXX XXX age make the XXXXXXXXXXXX revolution possible &XXXXX; and XXX it inevitable?**
XXX XXX of the last XXX age created XXX environmental XXXXXXXXXXXXX for farming XX warming XXXXXXXXXXXX, changing XXXXXXXX, and XXXXXXXX a XXXXX XXXXXXX of XXXXXX plants XX spread across XXXXXXXXXX. XXXXXXX these XXXXXXX, XXX XXXX grasses that would become XXXXX and barley might XXXXX XXXX XXXXX abundantly XXXXXX for XXXXXX to XXXXXX, XXXXXXX, XXX XXXXXXXXXX cultivate XXXX. however, it is XXXXX XXXXXX whether XXXXXXX XXX *XXXXXXXXXX* once the climate XXXXXXX. XXXXXXXXXX and archaeologists have found evidence that XXXXXXX XXXXXXXXX independently in XX XXXXX several XXXXXXXXX XXXXXXX — including XXX middle XXXX, XXXXX, and XXXXXXXXXXX &XXXXX; which XXXXXXXX XXXX XXXX XXXXXXXXXX XXXX right, the XXXXXXXXXX XX agriculture was a natural XXX recurring XXXXX response XX environmental XXXXXXXXXXX. XXX climate change did XXX cause farming directly, but it XXXXXX a XXXX XXXX XXXXX ingenuity XXXXXX through.
**XXXXXXXX 3: what is XXX connection XXXXXXX XXXX surplus and XXX XXXXXXXXXXX of XXXX complex societies, and can you see XXXX XXXXXXX in XXX XXXXXX XXXXX?**
XXXX surplus is XXX engine XX XXXXXX complexity. when a XXXXXXX XXXXXXXX more food XXXX it XXXXX XXX XXXXXXXXX XXXXXXXX, it XXXXX the XXXX valuable resource of XXX: *time*. time freed XXXX food production XXX XX XXXXXXXX in XXXXXXXXXXXXXX &XXXXX; in crafts, XXXXXXXXXXXXXX, art, XXXXXXX, XXX XXXXXXXXXX. XXXX pattern XX XXXXXXX XXXXXXX in XXXXXX times XX well. XXXXXXX with highly productive XXXXXXXXXXXX XXXXXXX (enabled XX modern XXXXXXXXX, XXXXXXXXXXX, XXX XXXXXXXXXX) XX XXX need their XXXXXX populations to XXXX as XXXXXXX; in XXX XXXXXX XXXXXX today, less XXXX X% XX the population XXXXX the rest. XXXX frees XXXXXXXX XX XXXXXXXX XX people to work XX XXXXXXX, XXXXXXXXX, XXXXXXXX, XXXXXXXXXXX, XXX artists. the same basic XXXXX that allowed a XXXXXXXXX XXXXXXX elder XX XXXX XXX XXXXXX from XXXXXXX duty is XXXX allows a modern XXXXXXX to sustain its extraordinary XXXXXXXXXX. the XXXXXXXXXXXX revolution XXX XXX just XXXXXX ancient life &XXXXX; it set the XXXXXXXX for XXXXX complex XXXXX society XXXX followed.
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*XXXXX XXX: when reviewing this chapter, XXX XXXXXXX XXX XXXX XXXXX XXXX XXXXXXX change XXX XXX way to specialization. XXXX XXXX in XXXX chain is a XXXXX-XXX-XXXXXX relationship, XXX XXXXXXXXXXXXX how XXXX connect will help you XXXXXX XXXX factual and analytical XXXXXXXXX XX XXX XXXX.*