ure of time, labor and expense.
They committed wastage of soluble plant foods (a variety of sin).

Malthus formulated a famous over-population fear-thought. It had basis
in his ignorance of the fact that steam was soon to become a factor in
the spreading of food supplies. Furthermore, he seemingly did not know
that when old top-soil frontiers had gone to the rear, new frontiers
would appear in the sub-soil. The tree digs deeper than the farmer ever
plowed.

After Malthus came hunger prophets who were ignorant of coming
possibilities of fleet transportation through the air. The caterpillar
tractor plunging into the tropical jungle will allow of the production
of a practically unlimited food supply. Famine in India, China, and
Russia is a social matter and unnecessary. Trees cure famine.

Within the past decade a number of thinkers on one end of the see-saw
have written heavily on the over-population question not knowing that
they and their birth control ideas were to be tossed into the air by
still heavier weight of fact on the other end of the see-saw.

The heavier weight of fact relates to the idea that famine does not
belong to tree food regions. It relates to the fact that tree foods can
supply all of the essentials of provender for men, livestock and fowls;
proteins, starches, fats and vitamines in delicious form. It relates to
the fact that tree foods come largely out of the sub-soil without
apparent diminution of fertility of the ground. The tree allows top-soil
bacteria and surface annual plants to manufacture plant food materials
and then deep roots take these materials to the leaves for elaboration
by sun chemistry.

Trees may be grown wherever crops of annual plants may be grown and
where annual plants may not be grown profitably. They do not require the
service of high cost labor for annual tillage of the soil. For example,
four large pecan trees or black walnut trees on an acre of ground
without tillage or fertilizer may average a thousand pounds of nut meats
annually for a century. How often is the market value and food value of
a thousand pounds of nut meats per acre equalled by crops from annual
plants which would require from 100 to 200 plowings and harrowings
during a hundred years of continuous cultivation leaving out the
question of expensive fertilizers and labor. Large populations live upon
dates, olives and figs. For trouble they have to look to religion.

Several centuries were required for