During my research, preparing my next presentations, i found this beautiful speech by Krafft Ehricke, in 1984, before he passed away.
Every single word is a precious teaching, a beautiful lecture on natural philosophy.
Ehricke was discussing against the claimed “limits to growth\.
The great space visionary Krafft A. Ehricke gave this comprehensive presentation on the industrialization and settlement of the Moon at the “Lunar Bases and Space Activities of the 21st Century” conference, held Oct. 29–31, 1984, at the National Academy of Sciences, Washington, DC.
Ehricke’s accompanying paper can be found here: http://www.lpi.usra.edu/publications/books/lunar_bases/LSBchapter12.pdf.