1.   This reservation system, which came to include state elected offices and government jobs, shook the rigid scaffolding of caste hierarchy.

2.   As in neighboring India, the caste hierarchy on which Hindu society is based continues to be a powerful force.

3.   As in neighboring India, the caste hierarchy on which Hindu society is based, continues to be a powerful force.

4.   Both the driver and his aide were Dalits, who are at the bottom of the rigid caste hierarchy.