Australia established the Sheffield Shield in 1892–93. Other national competitions to be established were the Currie Cup in South Africa, the Plunket Shield in New Zealand and the Ranji Trophy in India. The period from 1890 to the outbreak of the First World War has become one of nostalgia, ostensibly because the teams played cricket according to "the spirit of the game", but more realistically because it was a peacetime period that was shattered by the First World War. The era has been called The Golden Age of cricket and it featured numerous great names such as Grace, Wilfred Rhodes, C. B. Fry, Ranjitsinhji and Victor Trumper. Cricket started with four balls per over. In 1889 the four balls per over was replaced by a five balls per over and then this was changed to the current six balls per over in 1900. Subsequently, some countries experimented with eight balls per over. In 1922, the number of balls per over was changed from six to eight in Australia only. In 1924 the eight balls per over was extended to New Zealand and in 1937 to South Africa. In England, the eight balls per over was adopted experimentally for the 1939 season; the intention was to continue the experiment in 1940, but first-class cricket was suspended for the Second World War and when it resumed, English cricket reverted to the six ball over. The 1947 "Laws of Cricket" allowed six or eight balls depending on the conditions of play. Since the 1979/80 Australian and New Zealand seasons, the six balls per over has been used worldwide and the most recent version of the Laws in 2000 only permits six ball overs. When the Imperial Cricket Conference (as it was originally called) was founded in 1909, only England, Australia and South Africa were members. West Indies (1928), New Zealand (1930) and India (1932) became Test nations before World War II and Pakistan (1952) soon afterwards. The international game grew with several ICC Affiliate Members being appointed and, in the last quarter of the 20th century, three of those became full members: Sri Lanka (1982), Zimbabwe (1992) and Bangladesh (2000). They were followed in the early 21st century by Ireland and Afghanistan (both 2018). Test cricket remained the sport's highest level of standard throughout the 20th century but it had its problems, notably in the infamous "Bodyline Series" of 1932–33 when Douglas Jardine's England used so-called "leg theory" to try and neutralise the run-scoring brilliance of Australia's Don Bradman.