Excess consumption doesn't make people happy. We can continue to provide for our needs, but we can't continue the endless pursuit of ever more consumer goods. There is no energy source that can provide enough consumer goods to meet our human and emotional needs; there never has been, and that's why it's been such a fruitless pursuit.
If, while I hear the wild shriek of the slave mother robbed of her little ones, I do not open my mouth, am I not guilty?