The hosts of the 2026 tournament will be decided in May 2020. The CONCACAF Confederation, representing North and Central America and the Caribbean, is seen as a strong contender
Soccer's governing body, FIFA, voted on Tuesday to expand the World Cup to 48 teams from its current 32, brushing aside concerns that the expansion would lower the overall standard of the tournament and make it too big and unwieldy.
FIFA president Gianni Infantino, fulfilling a promise he made during last year's election campaign, said the move meant that "more can participate and many more will have a chance to dream".
"It’s not the 20th century any more. It’s the 21st century.
Football is more than Europe and South America. Football is global," he told reporters.
"The football fever you have in a country that qualifies for the World Cup is the biggest promotion of the sport you can have."
FIFA's 211 member associations each hold one vote in the presidential election, and 135 of them have never played at a World Cup, so expansion of the tournament was always likely to appeal.
The new format, to be introduced in 2026, will feature a first round of 16 groups of three teams, with the top two in each qualifying for a round of 32. From then on, it would be a straightforward knockout contest.
The hosts of the 2026 tournament will be decided in May 2020. The CONCACAF Confederation, representing North and Central America and the Caribbean, is seen as a strong contender, possibly providing a joint bid from at least two of the United States, Canada and Mexico.
The new-look tournament will increase the number of matches from 64 to 80, but Infantino said it would require the same number of match days and stadiums as now:
Those who have never qualified include 41 out of FIFA's 54 of its African members and 10 out of 11 members in the Oceania region.
The ECA, the association that represents more than 200 European clubs, most of which dislike releasing their players for international duty, said the decision had been taken for "political reasons rather than sporting ones" and "under considerable political pressure".
"We fail to see the merits to changing the current format of 32 that has proven to be the perfect formula from all perspectives," it said in a statement.
Reinhard Grindel, head of the German federation (DFB), said he saw a danger that "in the future we will see more defensive-minded teams".
"If the World Cup stops being as attractive, then fan and sponsor support suffers, as does its marketing."
The pressure group New FIFA Now, which has campaigned for reform of FIFA, said the move "will make a mockery of the qualification process for most confederations".
The inaugural World Cup, staged in 1930 in Uruguay, featured just 13 teams and 18 matches. Sixteen teams took part from 1934, eight more were added from 1982 onwards and, finally, another eight in 1998.