Given the importance of entrepreneurship to the emergence, design, management, and growth of enterprises, this section of the book intends to provide some insights into three recently observed combined phenomena. The first one is the phenomenon of the explosive growth of entrepreneurship activity via new startups (mostly technology- and innovation-based) and that of corporate venturing, called “corporate garage.” The second phenomenon is that of the growing importance of the High-Growth Firms (HGFs). These two phenomena are dealt with in this chapter. Finally, the third phenomenon, which is less well known, but can be understood as a foundation for the former two, is the importance of the business context, or environment, in which enterprises emerge, operate, and grow, and which is perceived by the growth of importance of concepts such as ecosystems, platforms, and architectures, which are examined in detail in Chapter 14.