But Albania's religious balance, as well as its political equilibrium, could be upset by the influx of Kosovars who are overwhelmingly (though not very zealously) Muslim and now have bitter experience of people who claim to be acting in the name of Orthodox Christianity.

ECONOMIST: The refugees

In the long term, fixed currency rates were a recipe for trouble because when economic times changed currencies, conversion rates needed to change as well to keep the economy in equilibrium.

FORBES: We're All Currency Manipulators These Days

Clubs such as the Boston Red Sox and Detroit Tigers did not take on their first black players until most other clubs had long utilized black players and clubs like the Dodgers and Giants were well on the way to their long run equilibrium number.

FORBES: Good Managers May Not Move First, Never Last

The result would be an equilibrium in which various attitudes to fairness do just as well as each other.

ECONOMIST: Evolution

The recent uprisings in some Arab states have highlighted the power of media and the human quest for media freedom, as well as underlining the fact that social inequalities will indefinitely search for equilibrium, in order to address those inequalities.

UNESCO: World Press Freedom Day 2013

In a well-functioning market, the price of property should bring demand and supply into equilibrium.

ECONOMIST: Why property markets suffer from bubble trouble