Former Arsenal defender Campbell hoping black Premier League managers will become the norm
The former England defender knows the work that has to be done before "institutionalised" attitudes change and more non-white prospects are given the chance to shine.
It starts with opportunities for jobs at the top level, then, gradually, it becomes normal.
"After you start, all of a sudden it becomes the norm," he told the Mirror. "Then you look back and think 'What were we doing 10 years ago? What was going on?'
"It's like the smoking ban. Not so long ago, you could smoke on an airplane. Now you wouldn't dream of it. You say, 'What were we thinking?'
"With Arsene, how many foreign managers are there in the Premier League now? It's the norm now."