This authoritative and enlightening book focuses on fundamental questions such as what is innovation, who is it relevant for, what are the effects, and what is the role of (innovation) policy in supporting innovation-diffusion? The first two sections present a comprehensive overview of our current knowledge on the phenomenon and analyse how this knowledge (and the scholarly community underpinning it) has evolved towards its present state. The third part explores the role of innovation for growth and development, while section four is concerned with the national innovation system and the role of (innovation) policy in influencing its dynamics and responding to the important challenges facing contemporary societies.