By the Shaykh - the Scholar of Hadeeth - Muhammad Naasir ud-Deen al-Albaanee [1]

[Q]: What are the foundations that will enable the Islaamic world to arise again anew?

[A]: That which I believe, is what has been reported in the authentic hadeeth - which is a clear answer to this question, and to those questions similar to it which are asked in our present time - and that is the Prophet sallallaahu 'alayhi wa sallam's saying:

"When you deal in 'eenah (a transaction involving usury), take hold of the tails of cows, become content with agriculture and abandon jihaad in the path of Allaah, then Allaah will permit your humiliation and He will not remove it from you, until you return to your Religion."[2]

Thus the foundation is to return to Islaam.