Syamalaji, Do we really learn from our past? Experience so far is not very positive. Two world wars and there is no end to small wars and at times on the brink of a third world war. Knowing fully well that the world is facing pandemic Covid-19, those muslims preacher did not cut short their mission and return home. Instead they are roaming all over the country spreading the virus. But humans do find a way out because of his capacity to rebuild. Both Japan and Germany were devastated in world war 2 but today they are on the top in many ways. Hope will guide us as long as we are breathing.