[eru]

> Some pursue happiness by having a lot of children, more than the planet can support.

Perhaps more than their country or their own income can support. But with current technology we can farm enough calories every year to keep every body well fed. (Of course, they are not distributed equally at the moment. But the sum comes out right. And we haven't even really started farming the oceans. We are still mostly hunter-gatherers there.)

[lutusp]

> with current technology we can farm enough calories every year to keep every body well fed.

False. Food growth rate increases arithmetically, based on available land. Population growth increases exponentially, based on reproductive potential. They cannot be compared -- population always increases until starvation limits the process, as modeled by the logistic function:

http://en.wikipedia.org/wiki/Logistic_function

Unequal distribution of food resources is an effect, not a cause. The cause is uncontrolled population increase.

In short, people will aggressively answer an increase in food supply by increasing the supply of hungry people, until starvation halts the process.

[eru]

> Food growth rate increases arithmetically, based on available land. Population growth increases exponentially, [...]

Sources? Malthus made the same mistake, if I remember right.

[lutusp]

>> Food growth rate increases arithmetically, based on available land. Population growth increases exponentially,

> Sources?

It's called "mathematics." Fields of corn don't spawn little offspring fields of corn on adjacent plots of land, but people do spawn little offspring people. The first is an arithmetic increase (as long as there is still arable land), but the second is exponential.

> Malthus made the same mistake, if I remember right.

Nonsense. He predicted something that hasn't happened yet. If a geologist predicts an earthquake with a probability of 50% within 30 years, and 35 years pass without an earthquake, does that make him wrong?