After all the fertile land in the immediate neighbourhood of the first settlers were cultivated, if capital and population increased, more food would be required, and it could only be procured from land not so advantageously situated.
It's the three pairs of eyes that mothers have to have. . . One pair that see through closed doors. Another in the back of her head. . . and, of course, the ones in front that can look at a child when he goofs up and reflect 'I understand and I love you' without so much as uttering a word.