This book, constructed around a central theme rather than a specific time period or region, aims to show how different researchers working on different topics address the issues around the inter-relationships between groups in pre- and protohistoric periods, through the analysis of certain raw materials. This diachronic perspective allows the reader to obtain a broader view of some of the lines of research that are being followed in different areas of the Mediterranean. The editors intend for this monograph to open its doors to researchers who work over a broad chronological period, rather than focusing on a specific moment, as some congresses or collective monographs do. It is hoped that it presents avenues for future research, which can help other researchers to understand some of the lines that are currently being followed and the methodologies that are being used to analyse and determine the origin of raw materials used in the preparation of ornaments, ceramic vessels, lithic instruments, and other objects.