Most computer scientistsand practitioners assume that we live in a world of possibilities and that inexorable forces of technological development will help bring us a future of increased wellbeing and of growing economic prosperity. An increasing number of scientists however point at the triple crisis(ecology, economy, energy) and imagine radically different futures based not on expansion and possibilities, but on limitations and/or decline. We propose that a broad program should be formulated that takes biophysical and economic limitations as its starting point and outline some areas that are paramount for HCI to come to grips with.