| | ipedia.com: Indus Valley Civilization Article (Site not responding. Last check: 2007-10-17) |
 | | There is no evidence of irrigation, but such evidence could have been obliterated by repeated, catastrophic floods. |
 | | The Indus civilization appears to disconfirm the hydraulic despotism hypothesis, which is concerned with the origin of urban civilization and the state. |
 | | To build these systems, a despotic, centralized state emerged that was capable of suppressing the social status of thousands of people and harnessing their labor as slaves. |
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