Contributor(s): Caroline Lucas | Caroline Lucas will explore the role of the EU as a force for progress; the likely impact of the EU referendum campaign and what green progress means in the EU context. Caroline Lucas (@CarolineLucas) is MP for Brighton Pavilion and former Leader of the Green Party. Robin Archer is Director of the Ralph Miliband Programme at LSE. The Ralph Miliband Programme (@rmilibandlse) is one of LSE's most prestigious lecture series and seeks to advance Ralph Miliband's spirit of free social inquiry.