The driving force for initiating the production of this book was my interest in improving the ability of researchers to contribute to tackling complex social, environmental and technical issues. Such issues cannot be easily delimited. Instead they highlight connections. For example, tackling an environmental issue like human-induced global climate change involves altering industrial, agricultural and personal practices, which are connected in a web. Considerations include economic growth and prosperity, employment, energy supplies, food security, transport, population growth and so on. Similarly, tackling an issue like illicit drugs involves dealing with the social problems that facilitate the illicit drugs trade, the personal and community dysfunctions that make using such drugs attractive, and the benefits associated with drug use.