What’s the meaning?
A return to previously held values of decency. You can also suggest that people have become too concerned with complicated details or new theories, and that they should concentrate on simple, important ideas or activities.
What’s the origin?
It appeared in the 70s. At first this term was used mainly for schooling that stresses proficiency in reading, writing, and mathematics, but it quickly was transferred to other areas.
And what about other languages?
In French, there are different ways to say that, but they all mean the same: “retour aux bases”, “retour à l’essentiel”, “retour aux valeurs fondamentales”.