He argued that the Labour Party was destined for electoral defeat as the traditional working class contracted .
Labour Party both appealed to a wider social constituency embracing other classes and revised Labour Party 's assumptions about the policies that would appeal to a majority of voters .
He argued that the Labour Party was destined for electoral defeat as the traditional working class contracted unless it both appealed to a wider social constituency embracing other classes and revised its assumptions about the policies that would appeal to a majority of voters .