In 1963 on the steps of the Lincoln Memorial in the US, Martin Luther King Jr famously declared: "I have a dream." It was an impassioned speech, calling for racial justice and equality in a country still reckoning with slavery, racism and segregation. His dream was for equal rights for black Americans in all aspects of life. More than 60 years later, his son, Martin Luther King III, is echoing the same sentiment as people in both Australia and the US reckon with varying levels of social upheaval