On Tuesday, former US President Barack Obama delivered the Nelson Mandela Annual Lecture.
Mr Obama addressed thousands of people including Bill Gates and South African leaders in Johannesburg, South Africa.
He described late Mandela as an inspiration to young people in the late 70s.
“Madiba’s light shone so brightly that in the late seventies he could inspire a young college student on the other side of the world to re-examine my own priorities – to reconsider the small role that I might play in bending the arc towards justice,” remarked Mr Obama.
“And now an entire generation has now grown up in a world that by most measures has gotten steadily freer, healthier, wealthier, less violent and more tolerant during the course of their lifetimes. It should make us hopeful.”
In his speech, Mr Obama tracked the enormous social and democratic progress the world has recorded in the 100 years between Mandela’s 1918 birth and 2018.
July 18 marked the 100th birthday of the late Nelson Mandela and individuals and organisations across the globe have reminisced on the impact of the anti-apartheid revolutionary.
Thanks to Mandela, the man fought for justice and equality for all and today he is being celebrated.
see tweets from UNICEF, Bill Gate and others here