It takes little experience in the investment business to realize that investors prefer good news. As a bear in the bull market of 1999 I was banned from an institution's building as being "dangerously persuasive and totally wrong!" The investment industry also has a great incentive to encourage this optimistic bias, for little money would be made if the market ticked slowly upwards. Five steps forward and two back are far more profitable.

Similarly, we environmentalists were shocked to realize how profoundly the general public preferred to believe good news on our climate, even if it meant disregarding the National Academies of the world. The fossil fuel industry, not surprisingly, encouraged this positive attitude. They had billions of dollars to protect. If the realistic information were to be widely believed, most of their assets would be stranded.

When dealing with realistic limits to growth it is also obvious how reluctant everyone is to accept the natural mathematical limits: There simply cannot be compound growth in a finite world. A modest 1% growth compounded for the 3,000 years of Ancient Egypt's population would have multiplied its economic output by nine trillion times!1 Yet, the improbability of feeding ten billion or so global inhabitants in 50 years is shrugged off with ease. And the entire economic and political system appears eager to encourage optimism on resources for it is completely wedded to the virtues of quantitative growth forever.

Hard realities in these three fields are inconvenient for vested interests and because the day of reckoning can always be seen as "later," politicians can always find a way to postpone necessary actions, as can we all: