Difficult to fault Richard Dennis’ “There is no certainty or precision in this world, and, at least for things as interesting and complex as our societies and economies, --.” But, as with the Scottish wag’s “keep Scotland tidy, throw your rubbish in England”, it’s a fair guess that limits apply to actions.

We’ve thrown the accumulation of millions of years of fossil carbon into the atmosphere in the space of a century or two. On top of that we have rabbited on over that short period so that there are now not one, but 6.7 billion consumers out grazing on the environment at any one instant: all feeding like crazy with wool over their eyes, except for the poor devils that are starving.

If the gurus doing the economic forecasting de-mist the above certainties from their rear vision mirrors, their deliberations might make more sense

Per the previous comment, it would have been good to have mentioned that the world may be fundamentalling changing. Check Peak Oil and Climate change. These are new and should affect 300 years of history.