How to save workplace diversity schemes from the DEI backlash (without collecting more data)

In a radio discussion on diversity, equity and inclusion (DEI) in the workplace, a journalist asked me which year these schemes started in the UK. I felt thrown by the question. It assumed that the broad array of initiatives associated with DEI, including policies, training programs, themed events and staff networks, had an inception date. I responded, as I often do: "It's complicated."