REQUIRES:
<l:4,8>Irrigation<e>
270 <l:6,93>Production<e>
8 <l:6,125>Support<e>

RESTRICTED TO:
<l:7,3>Tyranny<e>
<l:7,5>Republic<e>
<l:7,6>Imperium<e>
<l:7,15>Oligarchy<e>
<l:7,9>Absolutism<e>

OBSOLETED BY:
<l:4,135>Mind Control<e>