Do we need an Open Science coalition?

What exactly is Open Science? Its lack of an appropriate common definition has meant Open Science can be a variety of things; a social justice issue, part of a political capitalist regime, or a form of traditional science. But this lack of consensus leaves room for Open Science to be co-opted and even exploited. In seeking to (re)establish a common set of values and understanding here, Jon Tennant asks: do we need an Open Science coalition?