according to tecumseh, why should a tribe not sell land?

A tribe should not sell land, according to Tecumseh, because the land does not belong to any single tribe or chief but to all Native peoples collectively and cannot be sold by just a part of the whole.
Tecumseh’s Core Reason
Tecumseh argued that Native land was held in common by all tribes, like a shared inheritance from the Creator, not private property that individuals or single tribes could dispose of.
Because of this, any treaty where only some chiefs or one tribe agreed to sell land was, in his view, invalid and unjust, since it ignored the rights of all the other Native nations with a claim to that same land.
“Sell a Country? Why Not Sell the Air?”
In his famous protest, Tecumseh mocked the idea of selling land by comparing it to selling the air, the great waters, or the sky, implying these are sacred, shared elements that no one has the right to own and trade away.
By using this comparison, he stressed that land was part of a spiritual and communal order, not a commodity in a marketplace, so treating it like something that could be bought and sold was a moral violation.
Unity of All Tribes
Tecumseh believed all Native nations formed a single political and spiritual community when it came to land, so no tribe had the authority to break that unity by ceding territory on its own.
He insisted that, at minimum, all tribes affected by a land cession would have to agree, otherwise the sale was a betrayal of the larger Native confederacy and its survival.
Protection Against Exploitation
He also rejected land sales because many treaties were secured through pressure, manipulation, or unfair bargaining, such as the use of alcohol or targeting a few “willing” chiefs.
By opposing any sale by only a subset of leaders, Tecumseh was trying to protect Native communities from being gradually dispossessed through piecemeal, coerced agreements that Americans could exploit.
Short classroom-style answer
According to Tecumseh, a tribe should not sell land because the land belongs to all Native peoples together, as a sacred common possession, so no single tribe or group of chiefs has the right to sell it for everyone.
Information gathered from public forums or data available on the internet and portrayed here.