1 Geothermal heating & cooling ($4,500 - $6,000) : Considered an eco-friendly heating and cooling option, these systems use energy in the earth to pump heat into a home.
It's all very well to laugh at the military, but when one considers the meaning of life, it is a struggle between alternative viewpoints of life itself. And without the ability to defend one's own viewpoint against other, perhaps more aggresive ideologies, then reasonableness and moderation could quite simply disappear.
The Meaning of Life. Many major historical figures in philosophy have provided an answer to the question of what, if anything, makes life meaningful, although they typically have not put it in these terms. Consider, for instance, Aristotle on the human function, Aquinas on the beatific vision, and Kant on the highest good.