Facebook co-founder Mark Zuckerberg and his wife Priscilla Chan has decided to donate 99 per cent of their shares in the company to charity during their lives in an effort to make a happy and healthy world as they announced the birth of their daughter Maxima. In a letter to Maxima posted on his Facebook page,Zuckerberg said that "We are committed to doing our small part to help create this world for all children. We will give 99 per cent of our Facebook shares -- currently about $45 billion -- during our lives to join many others in improving this world for the next generation". "Priscilla and I are so happy to welcome our daughter Max into this world! For her birth, we wrote a letter to her about the world we hope she grows up in," he said.