Chief Seattle was a wise leader. When people were mourning the untimely doom of the tribal people, he realized that mourning the loss won’t make much sense, as it was bound to happen due to the rule of nature.
 
He argued —

Tribe follows tribe, and nation follows nation, like the waves of the sea. It is the order of nature, and regret is useless.

Seattle opined that the White men would face the same fate too, sooner or later. No one can escape from the common destiny of death and decay.