The claim comes after Harry said in an interview with US civil rights campaigner Rashad Robinson that racism was not just ‘down to the black community’ to deal with.

Speaking to National Public Radio, Finding Freedom author Omid Scobie said Harry’s ‘journey to wokeness’ was complete after seeing first-hand the racist attacks launched on Meghan.

She said: ‘Harry’s journey to wokeness has been very public. We’ve seen him learning and educating himself along the way, but this experience of witnessing Meghan face racist remarks and commentary would have been the first time he’d seen someone in his life or someone he was particularly close to affected by it in a certain way.

‘We talk about some of the more obvious examples in some of the media coverage but I think that the things that have flown under the radar are some of the othering of Meghan we’ve seen.

‘We’ve sort of seen it repeatedly that she’s not one of us. And now, what do they mean by not one of us?’

Finding Freedom is billed as a tell-all about Harry and Meghan’s decision to resign from their royal duties earlier this year.

The Sussexes denied speaking to the authors but the book was reportedly written with their cooperation.

Ms Scobie claimed the ‘starting point’ of the decision to leave began when Prince William cautioned Harry about the speed at which his relationship was progressing.

She added: ‘He’d also experienced some of his own friends speaking about Meghan or making negative remarks behind her back that word had travelled back to him about.

‘So when William sat down and had that conversation with him, that was the starting point.’

Co-author Caroline Durand claimed Harry chose to leave Britain to protect his family.

She said: ‘Harry really was looking out for his family.

‘His wife felt aggrieved, and they thought that the best decision that they could make was to step back, have a little bit more privacy but still be in a situation where they could carry on their mission, devote themselves to the causes that were so important to them.’

In his interview with civil rights activist Robinson, Harry compared addressing racism without first fixing institutional problems was like ‘bringing a bucket of water to a forest fire’.

He said: ‘We have to go to the root of the problem, the source of the problem, and actually fix it there.’

‘As we’ve discussed before, it is going to take every single one of us, this is not down to the black community, it’s going to take every single person on the planet right now.’