that secure possession is necessary to the use and improvement of land, i have already explained; but that ownership is not necessary is shown by the fact that in all civilized countries land owned by one person is cultivated and improved by other persons.

This is all lower case. Can you fix that?
That secure possession is necessary to the use and improvement of land, I have already explained; but that ownership is not necessary is shown by the fact that in all civilized countries land owned by one person is cultivated and improved by other persons.