Neil Young has posted a 2019 performance of his 1970 track 'Southern Man' in the wake of mass US protests against police brutality and the nation's treatment of the black community.

“Here’s me as an old guy singin’ his 50-year-old song that was written after countless years of racism in the USA,"the singer-songwriter wrote to his Archives Wednesday session.

"And look at us today! This has been going on for way too long. It’s not just ‘Southern Man’ now. It’s everywhere across the USA. It’s time for real change, new laws, new rules for policing.”

Turbulent protests erupted across the US and around the world in the wake of George Floyd's homicide last week at the hands of Minneapolis police officers.

The politically-driven lyrics of 'Southern Man' reflect heavily on the years of slavery in the Southern US States.

Young is a consistent critic of President Donald Trump, endorsing Senator Bernie Sanders for President last year after becoming an American citizen.

“Stand for the workers, stand for the teachers, stand for the students, stand up for climate justice. Stand for higher taxes on the super-rich to pay for all love the above! Stand for the American Future. Stand with Bernie Sanders,” he said at the time.

Young’s eagerly-awaited Seventies album, Homegrown, is expected to drop on June 19.

Check out the 2019 performance of 'Southern Man' here.