Being numerous does not make you a slave. Add in the increased vulnerability of very large numbers of people in the developing world, caused by civil wars, ethnic conflicts, kleptocratic governments, disease ... you name it, you know it.
人口众多并不导致奴隶问题， 但是在发展中国家， 过多的人口引发了一系列问题， 比如内战、民族冲突、政府腐败、疾病等等，