Change is a fundamental part of our lives. We see it happen in our environment, we undergo it ourselves, and we are also drivers of change. Change happens in the systems that govern our lives (e.g. political, financial, environmental), the organizations we belong to (e.g. the companies where we work, our families), or in ourselves (e.g. our tastes and preferences). The products we consume, or the companies we buy from, also change. And yet, despite this breadth of scenarios and contexts, there are only four ways in which change occurs: by evolution, by substitution, by revolution, or by collapse.