Why is the proclamation of 1763 considered the basis for aboriginal rights today?

The Proclamation of 1763 is considered the basis for aboriginal rights today because it recognized Indigenous peoples' land rights and established the principle that their lands could not be ceded without their consent. This foundational document asserted the British Crown's obligation to respect Indigenous territories, thereby laying the groundwork for future legal frameworks regarding Indigenous rights. Its acknowledgment of Indigenous sovereignty has been cited in various legal cases and treaties, reinforcing the idea that Indigenous nations have inherent rights to their lands and self-determination.