The article explores how groups of people make choices together and how complex it is to ensure those choices are fair for everyone involved. They found that making sure everyone is happy with the choices made can be really hard, especially when there are many options to consider. If we only need to find the best option for each person, it's not too difficult. But if we want to make sure everyone is happy with the choices made, it becomes a very tricky problem to solve. This is true for any group of two or more people.