Beneath the big, galloping fun of American Slang lies a unifying theme about the fleeting nature of youth.

NPR: First Listen: The Gaslight Anthem, 'American Slang'

One unifying theme in markets has been universal betterment of the economic picture.

FORBES: Respecting Caffeine, Steel, Zeus und Da Vinci Surgeons

Reporters assigned an arts profile like nothing better than to find a pattern or unifying theme in the subject's work.

WSJ: Cultural Conversation: Harriet Harris Loves Playing Bad Girls

In other words, he presented an argument that tied together everything the government is doing, and the unifying theme was aspiration.

BBC: David Cameron reveals his inner Tory

Under the unifying theme 'Chemistry our life, our future', IYC 2011 offers a range of interactive, entertaining, and educational activities for all ages.

UNESCO: OFFICE IN BRASILIA

If there was any unifying theme to the event, it was the presumed defects -- ideological, political, ethical -- of William Jefferson Clinton.

CNN: 'Uncovering Clinton: A Reporter's Story'

The two schools that Dulwich College has opened feature its iconic bell-tower as a unifying theme, says Graham Able, its headteacher and extensive playing fields.

ECONOMIST: Old schools are finding new markets abroad

For example, a recipe for dinner is not copyrightable, but a recipe book with a series of recipes selected based on a unifying theme would be copyrightable.

FORBES: What It Takes To Find, Scrape And Sell Big Data

The unifying theme was that we were among those most vocal, at least, about our concerns about the balance in the program between science and other aspects of NASA's agenda.

NPR: Budget Cuts Trigger NASA Resignations

That seems to be their only overriding, unifying theme.

FORBES: With Fiscal Cliff Talks Faltering, Obama Predicts Adverse Market Reaction If Deal Isn't Cut

The unifying theme of the separate opinions is vagueness, and whether courts should continue deferring so readily to Congress or federal agencies which so often draft laws or rules in imprecise or impenetrable language.

FORBES: Colorful Scalia Opinions Emphasize Bedrock Rule of Law Principles

In all, 37 states offered 160 ballot proposals, and the initiatives had no single unifying theme this November, unlike in 2004 and 2006, when voters saw same-sex marriage dominate ballots, according to the National Conference of State Legislatures.

CNN: Variety of proposals on ballots in 37 states

The unifying theme of the chapters that follow is that we are unrealistic about students at every level of academic ability asking too much from those at the bottom, asking the wrong things from those in the middle, and asking too little from those at the top.

WSJ: 'Real Education'