Having ambition will lead one into greed for more power, fame and/or fortune.
So is ambition good for the world?
Why dont we just aim to be the best that we can be? Why dont we aspire to be the best person we can be based on our integrity, values and principles? Why cant we just accept ourselves and be grateful for ehat we have?
Perhaps finding meaning in what we do is the best ambition to have so that we can be happy with ourselves and in the process, help or serve another. When we have meaning by adding value to others, we realise our own worth.