We often describe the triple bottom line -- society, economy, and environment -- as three intersecting circles of equal size. This is nonsense. The reality is that the largest circle should represent the biosphere. Within that, we have 30 million species, including us, that depend on it. Within the biosphere circle should be a much smaller circle, which is human society, and within that should be an even smaller circle, the economy. Neither of the inner circles should grow large enough to intersect with the bigger ones, but that's what's happening now as human societies and the economy hit their limits.