She was often called the "Iron Lady" for her uncompromising politics and leadership style. Political analyst Dennis Kavanagh concludes that the "Thatcher Government produced such a large number of far-reaching changes across much of the policy spectrum, that it passes 'reasonable' criteria of effectiveness, radicalism, and innovation". The Labour Party under James Callaghan (1976–79) contested the 1979 general election as unemployment passed the 1,000,000 mark and trade unions became more aggressive. The Conservatives used a highly effective poster created by advertisers Saatchi & Saatchi, showing an unemployment queue snaking into the distance, carrying the caption "Labour isn't working". The Conservatives received 43.9% of the vote and 339 seats to Labour's 269, for an overall majority of 44 seats at the 1979 general election. Labour was weakened by the steady long-term decline in the proportion of manual workers in the electorate. Twice as many manual workers normally voted Labour as voted Conservative, but they now constituted only 56% of the electorate. When the Labour Party led by Harold Wilson narrowly won the 1964 general election, manual workers had accounted for 63%. Furthermore, they were beginning to turn against the trade unions – alienated, perhaps, by the difficulties of the winter of 1978–9. In contrast, Conservative policies stressed wider home ownership, which Labour refused to match. Thatcher did best in districts where the economy was relatively strong and was weaker where it was contracting. Thatcherism As Prime Minister, she implemented policies focused on economic liberalism, using populism, and pragmatism, known as Thatcherism. Thatcher introduced a series of political and economic initiatives intended to reverse high unemployment and Britain's struggles in the wake of the Winter of Discontent and an ongoing recession. Her political philosophy and economic policies emphasised deregulation (particularly of the financial sector), flexible labour markets, the privatisation of state-owned companies and reducing the power and influence of trade unions. Due to recession and high unemployment, Thatcher's popularity during her first years in office waned until the beginning of 1982, a few months before the Falklands War. The afterglow of her victory at that war produced a resounding victory at the polls. She was re-elected in 1983 with an increased majority. Privatisation was an enduring legacy of Thatcherism; it was accepted by the future Labour ministry of Tony Blair. Her policy was to privatise nationalised corporations (such as telephone and aerospace firms). She sold public housing to tenants, all on favourable