Định Nghĩa và Ý Nghĩa của "back to (the) basics"

What is the origin of the idiom "back to basics" and when to use it?

The idiom "back to basics" is thought to have originated in the early 20th century, when it was used to describe a movement in education that emphasized the teaching of fundamental skills such as reading, writing, and arithmetic. The phrase is now used more broadly to mean a return to something simple or fundamental, after a period of complexity or innovation.