A search of John Holdren's book, ECOSCIENCE: POPULATION, & RESOURCES & ENVIRONMENT reveals that Holdren cited "Thomas Malthus" writings about over population on these page: 379, 731, 741, 742, 743, 791, 792, 797, 800, 801, 878, 889, 898, 950, 1017. The Discovery Channel Hostage Taker apparently cited and follows the views of "Thomas Malthus" as found here in this news link: http://www.mediabistro.com/galleycat/authors/thomas_malthus_reportedly_cited_by_discovery_channel_headquarters_hostage_taker_172485.asp