This is a very special book. It does not bring you new ideas that may be outdated in a few years from now. It brings you the 20 best articles ever published about entrepreneurship and small business. They have borne the test of time, and are still relevant and valuable. They really are the Keystones of Entrepreneurship Knowledge. With this book the International Council for Small Business (ICSB) celebrates its 50th anniversary. The ICSB is the major worldwide organisation bringing together people and organisations that are committed to the advancement of entrepreneurship and small business. Our membership is made up of researchers, policymakers, educators and service providers. Apart from their common interest and knowledge in entrepreneurship, ICSB members have a strong desire to share their knowledge with others. This book is an example of the type of products and services we strive to produce. It provides us an opportunity to achieve the ICSB mission: to share global knowledge with our growing global network.