"Population, when unchecked, increases in a geometrical ratio. Subsistence increases only in an arithmetical ratio. A slight acquaintance with numbers will shew the immensity of the first power in comparison of the second."
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Source : Thomas Robert Malthus (1959). “Population: The First Essay”, p.5, University of Michigan Press
Source : James E. Talmage (2012). “Articles of Faith: Being a Consideration of the Principal Doctrines of the Church of Jesus Christ of Latter-day Saints”, p.350, Lulu.com