The essence of an historical perspective is a thorough, systematic, critical awareness of the changes (or continuity) in events over time and of the context in which change or continuity occurs. In addition to regular full-length research articles, the Journal of Historical Research in Marketing (JHRM) occasionally features material under the following sections. Explorations & Insights includes invited commentaries about marketing history and the history of marketing thought. These tend to be shorter (three to six thousand words) than the full articles that run in each issue.  Sources of Historical Research in Marketing includes short essays introducing unexplored and novel archives and other primary historical resources, their contents and relevance to marketing history.  Archivists or library professionals who believe their collections might be of interest to marketing historians are invited to submit essays to contribute to this section. JHRM also invites historical review essays that focus on historically important marketing books under the section Forgotten Classics.