Forty-one Indian tribes have joined forces to restore the biodiversity of the Great Plains by renewing their historic relationship with the buffalo. According to Winona LaDuke, writing in Sierra (May-June 2000), the Intertribal Bison Cooperative is helping tribes acquire small bison herds to graze reservation lands, helping to cultivate and reseed the ailing prairie. “Buffalo are the animals of the past,” LaDuke writes, “but they are also the animals of the future.”