There are millions of people around the world that lack things many of us take for granted. In some countries, the lack of clean water is a daily threat to health. In other places a shortage of jobs means no money for food and other essentials. A lack of affordable living space leads to long commutes and homelessness. Absence of a social network can impact mental health. Every natural resource that people and societies depend on – from oil to lumber to rare elements is available in limited quantities and in limited areas. What things are in short supply in your own life and of people you know? What stories have you heard in the news about conflicts or suffering due to a lack of something? Everything we do in life potentially impacts others, because everyone is lacking something.