Why do some groups of people commit injustice towards other groups? Have any of these reasons changed throughout history?

Technician a says that the sine with dwell (swd) test is used to determine if an electronic stability control system functions normally. technician b says that the esc lamp, called a telltale light, is required to remain on for two minutes. who is correct?

The political, economic, or cultural environment that surrounds an event provides the event with its

What change took place in the african slave trade in the 1500's?