With growing international awareness of energy security challenges, the promise of space-based solar power for clean and unlimited energy for all humankind is certainly appealing. While significant progress continues in the enabling technologies of such systems, is there compelling evidence that space-based solar power systems will provide the best energy solution? How does the Army's current approach to incorporating a diverse portfolio of renewable energy sources in distributed locations compare with the potential of enterprise ventures that beam energy from solar collectors in space? For more than 4 decades, many credible organizations in government and industry have explored the concept of space-based solar power. But their serious studies often conclude that such systems remain on the future horizon, usually at least 10 years away from practical application.