Humans, short-lived as we are, tend to be impatient and expect a proper forest to appear almost immediately on land that has been abused, sometimes for thousands of years. This work is done by pioneer species and what many conservationists call 'invasive scrub'. Our policy will be to leave the land to heal itself and make no judgments as to what should happen there. We will do neither of these things. Any all land has equal potential.
Humans make value judgments based on human values.
They set up Sites of Special Scientific Interest and Areas of Outstanding Natural Beauty, promising not to destroy them unless a strong economic reason exists. We will have areas of unassuming natural beauty and sites that scientists aren't interested in, and promise to protect them from economic interests to the best of our ability by any appropriate means. Basically, we will buy any land that is cheap, and leave the rest to nature. We are also looking into other ways of re-claiming land for the wild, such as the grants and subsidies available to farmers. These will, of course, always involve some kind of compromise with the people who control the grants, so the primary objective will remain the purchase of land in order to keep interference to a minimum.