Because it depended on a limited resource. When fur traders and other Europeans entered the scene the demand for buffalo outweighed the supply choking off a vital resources for the Plains tribes.
Vulnerability
His vulnerability, as far as I know, is immortal women.
Meat
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cholesterol
Complex Source mastering biology
what a vulnerability of web based application
vulnerability
A social system with a reliable food source and with established laws, customs, and job specialization. Source: Harcourt School Publishers Thank You for your time and cooperation.
Vulnerability in child care refers to the exposure or the risk of the children to something.
Whether it is a vulnerability would be debatable, although it seems to be doing just fine depending on your perspective. Coffee being "omnipresent in daily life" would not be an argument for its vulnerability, however.
Rosalie Cullen is portrayed as vain, proud, and protective. She is also fiercely loyal to her family but can be aloof and distant with humans. Her character is complex, reflecting a mix of vulnerability and strength.