The animals and plants band together against the common threat and cooperate in trying to eliminate them, mutating to better kill humans. Jason proves this to the junkmen, first by having the grubbers safely handle one of the city's ultralethal species, then doing it himself. The city's science director pretends he is handling a training aid, and is able to do the same. With this knowledge and the cooperation of both Pyrran communities, Jason offers a solution. As the prejudices between the two cultures are generations old, the two communities cannot simply merge. Instead, select junkmen will live among the grubbers to learn their methods of coexistence, and in exchange selected grubbers will be given transport on the city's only spaceship to restore their connection with the rest of humanity. Trade will be continued fairly, with the grubbers trading food and ore to the city Pyrrans for technology and medicines. The educational system will be completely redesigned around grubber survival techniques, after which the city's children will live in new lodgings outside the besieged city, which will remain home to those who cannot adapt to the wilds of Pyrrus. Though the city will inevitably fall to the onslaught, those who have adapted will no longer be grubbers or junkmen, but simply Pyrrans. Kerk and the leader of the grubbers make peace. The junkmen who are unable to adapt need not die with the city. There are many worlds of great value that are too harsh for normal humans to colonize. Pyrrans can survive where others cannot. Deathworld 2 In Deathworld 2, Jason is kidnapped by the self-righteous Mikah, who is determined to bring him back to the planet Cassylia, ostensibly to be tried for his various crimes but really (Cassylia does not want Jason returned, since his huge winnings have been spent and the planet has used the incident to promote the "honesty" of its casino) to help Mikah's movement to overthrow the government, which they consider corrupt. Jason forces a crash-landing on a planet where the human population has regressed. The technology is extremely primitive and knowledge is split up among many small clans, each one jealously monopolizing what it knows. Jason uses his ingenuity to survive, trading his knowledge for protection and power in one of these clans. He eventually allies with a clan which has the knowledge of electricity. He creates innovations and machinery for the clan,