Ed Broadbent once told me that any great leader on the left must have two qualities.
First, they must have strength in their convictions. They must believe wholeheartedly in the cause, and be able to fall back on strong, authentic principles.
Secondly, they must have the ability to bring people into the fold. To gain people’s trust, and show them that their interests are our interests. To say yes, there is a place for them on the left.