What is the origin of the idiom "at a stroke" and when to use it?

The idiom "at a stroke " has its origins in the English language and dates back to at least the 16th century. Its usage can be traced to idiomatic expressions and figures of speech that convey the idea of a single, decisive action. It is often employed in discussions related to decision-making, policy changes, or problem-solving, emphasizing the ability to bring about immediate and far-reaching results.