The original signers of the U.S. Constitution were landowning white males of a certain age. Their rights to own slaves was respected. Voting rights were determined by the states.
Over the years voting rights were extended to blacks (mostly former slaves), women, younger people, indigenous and even poor people. Prejudice and legal tools were used to limit actual voting by minorities.
It takes many years including generations for prejudices to lessen in society. It involves heroes and martyrs like Martin Luther King Jr. or Harvey Milk. Forced to work with minorities some whites came to appreciate the "other" was not evil or incompetent. Adjusting to having women as bosses was hard for men, but some got used to it. Making judgments when confronted by hijabs, turbans, skullcaps or even baseball caps is still normal for most of us. Handicapped people are often ignored, although they are generally reliable employees. Society too often takes it time to mature, but more of us are making the effort.
All of humanity is not equal, but generally complement one another. Opportunity is also not equal and in effect means we do not always get the best mix. The offspring of wealthy successful parents are not necessarily as talented or even as ambitious.
In the meantime society controlled by those with power is able to protect their position against outsiders. Here are a few areas that make a difference to who gets opportunities or real choices.
Home ownership is actually the basis for many family fortunes, but denied to many blacks as they could not get affordable credit. Minorities are discouraged from the better neighborhoods.
Education is supposedly the tool for poor people to arise and it can work. However the quality is not the same in all neighborhoods. Not every student comes to class equally rested and nourished.
Jobs are not only a measure of talent, but also a mark of status. Discrimination based on race, gender religion or class ensure there is not true competition. Income affects the whole family.
Health is vital. Statistics have pointed out that blacks die more frequently than whites at childbirth and have a shorter life span. They receive poorer quality care from doctors.
These factors are going in the right direction, but still have a way to go. Despite the listed obstacles many black and other minorities have succeeded, but that seems to alarm many whites. Population trends point that racial minorities will be the majority within only a few decades.
Undoubtedly some deserving whites lose out and in a sense we all lose when that happens. Competition often is used a a decider. Being privileged means a lot is taken for granted. Over time the ideal should be to find the best fit for every human. Fairness is another ideal which means that society should not judge merely by outside features, but examine more closely the talents and merits of individuals.
D.E.I .has served America well, in fact better than privileged decision makers of the past. In the future it will be less and less necessary, that is if allowed to further prove its worth.