I completely disagree. Land ownership should never be perpetual. It should be time limited. Old people own all the land, while young people must buy it from them. That is naturally unjust and forces people to use violence to obtain land. The only sliver natural justice remaining here is the justice of killing "oppressors". If people do not step down from their positions of power voluntarily, then people will force them to step down.
I obviously do not want this to happen so I will argue against anyone who wants earth to be littered with wars over land.
Wars do not break out because people are evil, wars break out because our laws and rules during peace time aren't good enough for everyone. If land is properly allocated to everyone, then borders become irrelevant goals for war. The difference between whether you trade to get indirect access to land or whether you own it should be so slim, that no one ever considers obtaining land forcibly be ever worth it because the peaceful methods work just fine.