It is not widely understood that the importance of small businesses only became apparent with the publication of David Birch's book `The Job Generation Process' in 1979. Over the past four decades, governments across the globe have struggled to design, implement and evaluate policies that benefit the development of small firms. Deciding whether macro- or micro-policies are more appropriate for a given context has usually created an initial challenge for policy-makers. However, a cause for even greater dispute has been determining and agreeing what might be the preferred outcomes of such policies (e.g. more firms, better performing firms, fewer firm failures, job creation, greater productivity, higher levels of innovation, inclusivity of disadvantaged groups). Furthermore, evaluating the impact of specific policies presents a wide range of difficulties since it is impossible to isolate a simple cause-and-effect relationship between policy and its stated goal. This book explores the development of small business policy in 5 countries across 5 continents and seeks to develop a deeper understanding regarding how small business policy has evolved in these countries and what we might learn from their experiences. This book was originally published as a special issue of Small Enterprise Research.