It will be more peaceful if people have access to land

We are a moral species.

People behave in a moral manner when they can. If resources are scarce people will take what they need from the environment, even if that is the life of another animal, but if not, and resources are plentiful, generally people (and animals) will leave each other alone. For one thing, it is costly to be aggressive since there could be retaliation, if not directly from the victim perhaps from colleagues.

Given that, to make a more pleasant environment we should make sure individuals have access to resources.