The report, commissioned by the ex-Prime Minister, points to the rise of anti-EU parties in Italy, Hungary, Poland and the Czech Republic.
Mr Blair's Institute for Global Change said populism could become the "new normal" in Europe and "transform public policy in radical ways".
Research found the share of the vote taken by populist parties has almost trebled since 2000, rising from 8.5 percent to 24.1 percent. ...