Excerpt from Which Future? by Donella Meadows, In Context #43, Winter 1995/96.  The $1M question of the 21st century: How to get from Scenario A, our current unsustainable business as usual scenario, to Scenario B, a dynamic state of sustainability following the principles of nature, that is, the principles of the prosperous and successful fundamental economy of the planet. Scenario A depends on the invisible destruction and transfer of natural capital, assets, wealth from the natural economy to the human economy, and in so doing, the human economy is invisibly and unwittingly destroying itself, all the while accounting for the process as growth, net value added. Humanity is nearing the end of the invisible consequences and the point of irreparable damage.