Blue and Green: In a letter sent to prime minister David Cameron, the former wife of Nelson Mandela, Graça Machel, archbishop Desmond Tutu and U2 frontman Bono, said 2015 should be a year of international development, as rising inequality will lead to future conflicts.
The letter comes as a warning, as it states that not even the rich will be able to protect themselves from conflicts deriving from increasing levels of poverty and global instability.
The letter was also signed by Nobel peace prize winner Muhammad...