A Black Lives Matter rally in Birmingham, England (Ben Birchall/PA)
Legend, who released his latest album Bigger Love on Friday, said many of the recent protests in the US, UK and further afield were "rooted" in "old wounds".
He said: "The legacy of colonialism, of slavery, is still with us all around the world.
"We are dealing with it in the United States.
"I think so much of the protests that are happening now here and around the world are rooted in these old wounds that have never really completely healed, when it comes to the affects that colonialism and slavery have had on black people and other people of colour around the world.
"It’s a really difficult question to think about statues and other people that we have revered in our history and our myth-making around our countries’ histories, how we look at them now with modern eyes.
"In the States a lot of our founding fathers were also slave owners and helped perpetuate what was a really evil institution."