Gene Wolfe answered several questions related to Quetzal's motivations in a Q&A session recorded here: <a href="http://www.ansible.co.uk/cc/cc77.html/quetxal">http://www.ansible.co.uk/cc/cc77.html/quetxal</a><br><br>
Check out answers 7, 23, and 24. He said that Quetzal wanted a "thriving human colony on Green" (which almost seems like a contradiction in terms to me).<br><br>