2017 marked the fiftieth anniversary of the founding of both the Society for Historical Archaeology, in North America, and the Society for Post-Medieval Archaeology, in the UK. Each society celebrated this milestone by publishing a collection of forward-looking essays in their respective journals (see Brooks 2016; Matthews 2016). Although each group of practitioners has followed what might be best described as parallel, but not convergent, intellectual tracks, what they have shared is a common focus on the period of European expansion and colonialism starting in the late fifteenth century. Since that time, the two fields have grown much closer, while the larger intellectual project that is historical archaeology has seen its popularity grow across the globe. In many respects, these three volumes, while different, nevertheless provide a rich collection of chapters that reveal both the widening and deepening of the field.