The final chapter presents responses to the content of the entire book by policy practitioners who have dealt with the realities of constructing and implementing policies. They include essays by Emily Shuckburgh, OBE, deputy head of the Polar Oceans Team at the British Antarctic Survey; John Deutch, currently Institute Professor at the Massachusetts Institute of Technology and former Deputy Secretary of Energy in the United States; and Lord Ronald Oxburgh, who is a British parliamentarian, member of the House of Lords, a former chairman of Shell and himself a geologist and geophysicist. These ‘technologists’ offer three different perspectives on the topic of ‘good energy policy’. Finally the editors provide the main lessons learned from the book and offer suggestions for future directions of multidisciplinary research in energy policy.