Definition: You are given a sentence in Arabic. Your job is to translate the Arabic sentence into English.
Input: إذا لم تستثمر الولايات المتحدة في مدارسها ومهاراتها قبل قرن من الزمان مع حركة المدرسة الثانوية ، سنكون أقل ازدهاراً ، أقل تحركاً ، وربما مجتمع أقَل سعادة بكثير.
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
If the US had not invested in its schools and in its skills a century ago with the high school movement, we would be a less prosperous, a less mobile and probably a lot less happy society.