There is a breath of fresh air that has wafted through our political system over the last three weeks, ushering in a balmy spring-like feeling of optimism and goodwill. Its name is Malcolm Turnbull. Under the leadership of the Member for Wentworth, a Sydney harbourside locale recognised as a bastion of political wisdom and repository of progressive thinking, our politics have taken on a kinder, gentler and more sophisticated sensibility.