A Study Week on the subject of 'Transgenic Plants for Food Security in the Context of Development'. was held under the sponsorship of the Pontifical Academy of Sciences at its headquarters in the Casina Pio IV in the Vatican from 15 to 19 May 2009. During the course of the meeting, we surveyed recent advances in the scientific understanding of novel varieties of genetically engineered (GE) plants, as well as the social conditions under which GE technology could be made available for the improvement of agriculture in general and for the benefit of the poor and vulnerable in particular. The spirit of the participants was inspired by the same approach to technology that Benedict XVI expressed in his new Encyclical, in particular that 'Technology is the objective side of human action (1) whose origin and raison d'etre is found in the subjective element: the worker himself. For this reason, technology is never merely technology. It reveals man and his aspirations towards development, it expresses the inner tension that impels him gradually to overcome material limitations. Technology, in this sense, is a response to God's command to till and to keep the land (cf. Gen 2:15) that he has entrusted to humanity, and it must serve to reinforce the covenant between human beings and the environment, a covenant that should mirror God's creative love'. (2)