Answer:
The reason was that people in the past considered slaves less than human. This can be seen in the 3/5ths compromise where a slave wasnt values equally to a white person.
Explanation:
Between racism and a fale belief that a race was superior to another giving rights to slaves was uncommon since as stated they were seen as less than human and hence not given the bare human rights everyone deserves
It can impact the people because you are opening a new enemy or powerful ally that could be of use to people who need it also it could mean of new trade that opens up a new culture to learn and adapt to this could also impact their religion in case the new empire has different ways and religion than than the region
Their locker numbers were:
Dylan: 837
Eric: 624