Analysis. The correlation matrix Y axis reads: population, area, youth 0-15, adults 15-65, elderly over 65 years, total fertility rate (TFR), gross domestic product per capita (GDP), then % workers in agriculture, industry & services. High income & longevity have r = 0.9642. The logic in these linear correlations is of course selfevident. However, USA & Canada are quite out of place.

The foremost fact is that high birth rate is usually associated with a youthful population. Next this youthful population is associated will POVERTY. Nothing can be seen more clearly.

Then follow with family planning and health care. Read on fertility transition at http://www.pitt.edu/~super1/lecture/lec13311/001.htm