Anthony Seldon introduces the concept of the Effect series, the key questions and the fourteen wasted years accusation. This Effect book will be the eighth in the long line of academic and historical analyses dating back over fifty years of history to 1970 – and it builds on the conclusions and methodology of previous works in the series. One of these, The Coalition Effect (Cambridge, 2015), encompassed five of the years in question – allowing reflections to be made on the authors’ arguments in that volume, and for the impact to be judged in a longer time frame of government.