The “Major Historical Developments” section of each chapter, provides a student friendly text to show students the most essential information they are required to learn. The “chunking of information” is a guiding principle wherever content is presented. The chunking of information breaks down content material into smaller “bite-sized” pieces. Educational research has consistently shown that student comprehension and memory are greatly assisted when content information appears in smaller, more easily “digestible” chunks, as it does throughout this book.