The World is shrinking and becoming a Global Family. Keep reminding, that we are the children of Adam AS and Hawaa AS and we are Cousin Brothers and Cousin Sisters and we are a Global Family.
"And surely We have honoured the children of Adam, and We carry them in the land and the sea, and We have given them of the good things, and We have made them to excel by an appropriate excellence over most of those whom We have created." (Quraan_017.070)
It is NOT only the Duty of the Scholars to do Dawah (Tell the TRUTH about the Message of Allah), to save the whole world from Disasters. A single Scholar may not be able to do the door-to-door Dawah to tens of millions of people. It is the DUTY on EVERY Single Muslim to do Dawah with Wisdom. As an example, do some dialog and give them them Quraan, if they are really interested and give the address of Scholars to contact for more clarifications.
Allah Saved Only those Who were doing Dawah
"But why were there not among the generations before you those possessing understanding, who should have forbidden the making of mischief in the earth, except a few of those whom (ONLY) We Saved (from harm)? And those who were unjust went after what they are made to enjoy of plenty, and they were guilty." (Quraan_011:116)
"Ye are the best of peoples, evolved for humankind, enjoining (order) what is right, forbidding what is wrong, and believing in Allah. If only the People of the Book had faith, it was best for them: among them are some who have faith, but most of them are perverted transgressors." (Quraan_003.110)
"O ye who believe! Save yourselves and your families from a Fire whose fuel is Men and Stones, over which are (appointed) angels stern (and) severe, who flinch not (from executing) the Commands they receive from Allah, but do (precisely) what they are commanded." (Quraan_066.006)
An important matter for Muslims to realize is that Dawah is an obligation (DUTY) upon all. Allah (subhaanahu wa ta`aalaa) says in the Quraan: "INVITE to the Way of your Lord (i.e. Islam) with WISDOM and fair preaching." (Quraan_016.125)