Communicating with future generations is not merely a question of "how" to communicate, but also of "what." Our major moral responsibilities to future generations concern the size of future populations, conservation of nonrenewable resources, diversity of the gene pool, and quality of the environment. To determine our responsibilities in these areas, let us accept five presuppositions: (1) as members of the human species, future generations will be essentially the same as we are; (2) future generations will seek pleasure, just as we do; (3) it is an accident of history that one is born in any given generation; (4) our survival as a species is more important than our individual survival; and (5) we are one with future generations and will share actively in their lives. Based on these presuppositions, we can say that we owe to future people the opportunity to meet their basic needs for a decent life. Our responsibility to future generations is to preserve diversity, both of the gene pool and of resources. We are obliged to leave them with the kinds and quantities of nonrenewable resources we can reasonably anticipate they will need. We are part of a species and share in the common responsibility for that species and its continuation. (HTH)