This volume highlights the richness of studies focusing on the evolutionary dynamics of wild populations. It shows the diversity of organisms and approaches that can be used to reveal and understand empirical patterns, with-often, but not always-the goal of improving the long-term conservation of wild populations. This diversity reflects the diversity of questions that occupy evolutionary biologists working in wild populations, which go from revealing their global (epi)genetic and phenotypic structure at different spatial and temporal scales to the search of the inherited bases of ecologically relevant phenotypic traits. This volume should be an important contribution to the field because firstly, papers selected in this issue provide answers to timely questions in evolutionary biology. Secondly, it proves that much has to be explored to understand the causes and consequences of evolutionary dynamics of wild populations, and hence that scientists still have to put effort into the study of wild populations.