Equal pay for equal work is the concept of labour rights that individuals in the same workplace be given equal pay. It is most commonly used in the context of sexual discrimination, in relation to the gender pay gap. Equal pay relates to the full range of payments and benefits, including basic pay, non-salary payments, bonuses and allowances. Some countries have moved faster than others in addressing equal pay. Early history As wage labor became increasingly formalized during the Industrial Revolution, women were often paid less than their male counterparts for the same labor, whether for the explicit reason that they were women or under another pretext. The principle of equal pay for equal work arose at the same part of first-wave feminism, with early efforts for equal pay being associated with nineteenth-century Trade Union activism in industrialized countries: for example, a series of strikes by unionized women in the UK in the 1830s. Pressure from Trade Unions has had varied effects, with trade unions sometimes promoting conservatism. Carrie Ashton Johnson was an American suffragist who related equal pay and wages of women in the industrial workforce to the issue of women's suffrage. In 1895, she was quoted by the Chicago Tribune as having said, "When women are given the ballot, there will be equal pay for equal work." However, following the Second World War, trade unions and the legislatures of industrialized countries gradually embraced the principle of equal pay for equal work; one example of this process is the UK's introduction of the Equal Pay Act 1970 in response both to the Treaty of Rome and the Ford sewing machinists strike of 1968. In recent years European trade unions have generally exerted pressure on states and employers to progress in this direction. International human rights law In international human rights law, the statement on equal pay is the 1951 Equal Remuneration Convention, Convention 100 of the International Labour Organization, a United Nations body. The Convention states that Each Member shall, by means appropriate to the methods in operation for determining rates of remuneration, promote and, in so far as is consistent with such methods, ensure the application to all workers of the principle of equal remuneration for men and women workers for work of equal value. Equal pay for equal work is also covered by Article 7 of the International Covenant on Economic, Social and Cultural Rights, Article 4