0)"></path></svg>
					</svg>
				</a>
	
				</h2>
	</div>	<p>People abandoned thriving cities in Mesopotamia, the Indus Valley and farther afield at about
		the same time as a decades-long drought gripped parts of the planet.</p>

	<div class="c-section-heading c-section-heading--no-bt">
		<h3>
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				</h3>
	</div>	<p>People abandoned thriving cities in Mesopotamia, the Indus Valley and farther afield at about
		the same time as a decades-long drought gripped parts of the plane