If you've heard Hayek's name, it will have been as Keynes' arch enemy - the "Austrian" economist who wrote the Road to Serfdom and believed that markets should be as free as humanly possible.
Their statement said the existence of such a tendency in the Islamic regime had encouraged Iran's arch-enemy - the US - to think of a military invasion of the country.
And on Monday morning, Hamas's leadership in Damascus sent representatives to their new arch-enemy Egypt to begin discussing cease-fire terms.
The idea harkens back to the days of Republican arch-enemy Franklin Delano Roosevelt, who was re-elected with high unemployment because of his jobs program.
Mr Duhalde retains control over this political machine, which he deployed to help Mr Kirchner defeat his arch-enemy Carlos Menem, Argentina's president from 1989-99.
He reinforced his ties with Iran and with its arch-enemy, Saddam Hussein's Iraq .
For the time being, though, the divided left has elected a winner already: its arch-enemy Silvio Berlusconi.
Mr. Sharif regularly reminds voters that he had brought an improvement in Pakistan's relations with arch-enemy India.
State-controlled television interrupted its coverage of Pakistan's nail-biting World Cup cricket match with arch-enemy India to break the news.
The current president, Eduardo Duhalde Mr Kirchner's sponsor, and Mr Menem's arch-enemy also brought forward his departure after social unrest last year.
And any perceived weakness among the Sunni royals could be leveraged by arch-enemy Iran to sew unrest among the Shia.
Mr Torrijos junior's strongest challenger, Mireya Moscoso, is the widow of a former president, Arnulfo Arias, who was General Torrijos's arch-enemy.
Brahma, though stronger, lacks a premium-brand soft drink, which its former arch-enemy has in the form of Guarana Antarctica, a type of fruit soda.
He was then jailed in Panama in 2000 for plotting the assassination of his arch-enemy, the Cuban leader Fidel Castro, but was pardoned and released four years later.
Many of the ICU leadership fled, but Al-Shabaab launched a guerrilla war against the 17, 000 Ethiopian soldiers deployed, drawing support from many Somalis, for whom Ethiopia is the regional arch-enemy.
What is odd is that the new boss, Piotr Farfal, comes from the League of Polish Families (LPR), a radical right-wing outfit, normally seen as an arch-enemy by Warsaw's liberals.
Pakistan prefers to make common cause with ethnic Pushtuns, who straddle the border, to guard against Tajiks, Uzbeks and Hazaras, whom the generals regard as close to India, their arch-enemy.
Despite Rubio's rise, he is largely a darling of the Tea Party, and its supporters have been the arch-enemy of the left as they are driving GOP candidates further to the right.
Matsushita the world's largest consumer-electronics firm and Sony's arch-enemy refused.
They are often accused of working for Saad Hariri, Lebanon's former prime minister, once again an arch-enemy of Mr Assad, or for Prince Bandar bin Sultan, a Saudi who heads his country's national security council.
ECONOMIST: The crisis in Syria: More stick than carrot | The
Add that to its successful rocket launch in December and the threat of a North Korea ready to strike at the United States, which it sees as its arch-enemy, would appear to be more real than ever.
Tensions between the Democratic People's Republic of Korea and the rest of world have been rising since it announced in January that it planned to conduct a "high-level nuclear test" and rehearse long-range rocket launches aimed at the US "arch-enemy".
"We do not hide that the various satellites and long-range rockets we will continue to launch, as well as the high-level nuclear test we will proceed with, are aimed at our arch-enemy, the United States, " KCNA quoted it as saying.
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