I did not suggest that they have little agency around population control. What I suggested was that aliens will continue to <i>want</i> to have children, and so space will be needed for those children given that the parents won&#x27;t be dying any time soon.<p>Beyond that, if you have effectively infinite space and resources, there&#x27;s no need at all to have even the slightest bit of population control. Population control is only necessary to ensure adequate resources (including space to live) for everybody. But when there&#x27;s no constraint on resources, there&#x27;s no reason why anybody shouldn&#x27;t have as many children as they desire.