COLUMN-Euro at 20 - success amid all the flaws: McGeever

(Repeats story first moved on Nov 26 without change to text. The opinions expressed here are those of the author, a columnist for Reuters)

By Jamie McGeever

LONDON, Nov 26 (Reuters) - The euro turns 20 in January but came of age as the world's number two currency some time ago.

After two decades of relentless critique and predictions of doom, the single currency has already outlived many of its harshest critics' predictions when it was born in 1999.

But for all its well-documented flaws and all the blistering criticism of European monetary union, the euro has emerged after two decades with three notable achievements.

First, opinion polls show it garnering higher public support than at any point in those two decades.

Second, governments in the bloc's most indebted countries have saved trillions of euros due to the lowering borrowing costs it offered.

And third, the European Central Bank has proven far more flexible and innovative in the face of periodic crises than even its strongest advocates thought possible when it was designed in the late 1990s.

While those conclusions mask the highs and lows of the intervening period, they are testament to the durability and adaptability of a system many - including Nobel laureate and U.S. monetarist Milton Friedman - felt was too rigid to get past its first full-blown recession.

In 2010, the year Greece received its first international multi-billion euro rescue package and Ireland was also bailed out, only 51 percent of respondents in an annual European Commission poll thought the euro was a good thing for their country.

The 2018 survey published last week showed that 64 percent of respondents across the euro zone said the euro was a good thing for their country, and almost three quarters said that they thought it was a good thing for Europe.

These are the highest levels of support since surveys began in 2002. In only two countries - Lithuania and Cyprus - do a majority of people think the euro is a bad thing.

Remarkably, despite the deep economic and social pain inflicted on them by the harsh terms of the rescue loans, 60 percent of Greeks say the euro is good for Greece, and 71 percent say it is good for Europe.

Attitudes in Italy are also revealing. Italian growth has been anaemic for years, Italy boasts the world's third-largest debt burden, and the current populist government has in the past threatened to leave the euro.

Yet 57 percent of Italians think the euro is a good thing for Italy and 68 percent think it is a good thing for Europe, according to the European Commission poll.