Good Neighbourliness in the European Legal Context provides the first detailed assessment of the essence and application of the principle of good neighbourly relations in the European legal context, illustrating its findings by a multi-faceted array of studies dedicated to the functioning of good neighbourly relations in a number of key fields of EU law. The main claim put forward in this book is that the principle of good neighbourly relations came to occupy a vital place in the Europan legal context, underpinning the very essence of the integration exercise.