Fully endorsed by Edexcel, this textbook will help A2 students to understand the content and requirements of the Edexcel specification. The book provides comprehensive coverage of Units 3 and 4, including all the options in Unit 4. The content supports the specification and offers guidance on how to approach research and identify synoptic themes. — Key terms are defined in an extensive glossary — Case studies have been specially written for this book — Important themes, ideas and models are clarified in key concepts — Review questions enable students to test their knowledge of each topic