OSLO — A coalition of Tunisian workers, business owners, rights activists and lawyers won the Nobel Peace Prize on Friday for intervening at a crucial time to push the North African country that sparked the Arab Spring revolutions toward democracy and away from civil war. “It established an alternative, peaceful political process at a time when the country was on the brink of civil war,” the committee said in its citation. The prize is a huge victory for small Tunisia, whose young and still shaky democracy suffered two extremist attacks this year that killed 60 people and devastated its vital tourism industry. The National Dialogue Quartet is made up of the Tunisian General Labor Union; the Tunisian Confederation of Industry, Trade and Handicrafts; the Tunisian Human Rights League; and the Tunisian Order of Lawyers.