With both policy-making and leadership selection, there is a balance between the participation and involvement of grassroots members and the input of the party’s MPs and institutional stakeholders, such as Labour’s affiliated unions. If ordinary members are not involved in the selection process, there is the risk that they will become disillusioned and less willing to volunteer and campaign for the party at election time. Yet, without some peer review by those who probably best know the candidates, there is the danger that the chosen leader may lack sufficient support from their parliamentary group, a problem that often affected Corbyn during his leadership of the Labour Party. However, grassroots activists are often more extreme in their political views than ordinary voters. Excessive devolution of policy-making to the wider party membership could prove electorally damaging. Overall, therefore, parties aim to strike a balance between membership participation and central direction/filtering, with perhaps a growing bias towards centralised control.