From harnessing the power of human and animal muscles and burning wood to steam-driven and nuclear energy, ingenious people continue to find ways to produce more power for their communities’ needs and activities.  However, to save the planet and all living things from potentially calamitous ecological harm, there are legislative decisions being made to stop generating power from environmentally unsound energy sources. These include, but are not limited to, sources that can damage the geological structure of the Earth, involve the formation of hazardous, radioactive wastes, or whose use produces carbon emissions.  Moreover, in many cases, such sources cannot be renewed and so, as their availability diminishes, alternatives will be needed to meet the energy demands of future generations.  Energy and power play crucial roles in the provision of the basic necessities of life, such as breathable air, nutritious food, clean water, and adequate housing.  If these essentials are to be enjoyed by all people, they need to be affordable.  Can all these needs be met and sustained in the near future and for subsequent generations?  A modest goal may be the adoption of the Haudenosaunee principle by which decisions made today should result in a sustainable future for the next seven generations.  But it appears that the decisions made seven generations ago, at the start of the modern industrial period, have led, probably inadvertently, to the ostensibly grim environmental and climate issues of today.  Can the drastic mistakes made then be corrected now for future generations by using power generated from sustainable external energy sources and celestial phenomena over which we have no direct influence other than the methods of conversion?