Only two players have ever had such a decisive influence on a World Cup campaign.

BBC: History beckons Ronaldo

Mr Fujimori's autocratic regime has decisive influence over what is broadcast by all free television stations.

ECONOMIST: Peru

Carlo Ancelotti's men visit Old Trafford on Saturday for a clash that could have a decisive influence on the outcome of the title race.

BBC: Ferguson defends Vidic over challenge on Elmander

Once you grasp the decisive influence of power concerns in political outcomes, it becomes much easier to understand the internal rhythms of the federal government.

FORBES: How Politics Will Shape The Defense Downturn

Years before the US beers inspired a flowering of British brewers, beers in the UK had a decisive influence on the US craft revival of the 1970s.

BBC: US craft beer: How it inspired British brewers

This is especially true of Anne Boleyn, the decisive influence in Henry's life and reign, and certainly the only woman he genuinely loved for any length of time.

ECONOMIST: Tudor history

In 1939, the race was on between Germany and the United States to see who would be the first to develop a bomb that could provide enormous, perhaps even decisive, influence over world affairs.

FORBES: A Veterans Day Story: Immigrants and the Atomic Bomb

He also notes that such influence is more decisive in local campaigns, where turnout is low, than in national ones.

ECONOMIST: Public-sector workers

This weekend's two-day event in Cardiff features six games and all 12 Super League clubs as the sport takes a decisive step towards extending its influence beyond its traditional boundaries.

BBC: Rugby league looks to new horizon

Because Bahrain hosts a U.S. naval presence, and because it has been able to cultivate an international image as an ally against radicalism even as it remains a theocratic state, there is an assumption that the American influence in Bahrain could be decisive.

FORBES: Three Lessons in Bahrain

National security will not be the decisive factor in whether Obama wins a second term, but it will influence swing voters who traditionally value stability over the uncertainty of new leadership.

FORBES: Obama Helping Voters Feel 'Secure'

Advocates of the latter argue that an on-ground presence will demonstrate American commitment to Africa, enable American influence to flow with greater velocity, and assist AFRICOM in playing the decisive role its many defenders advocate.

CENTERFORSECURITYPOLICY: AFRICOM proceeds apace