Srila Bhaktisiddhanta Sarasvati Thakur used to say-"The only problem in this world is the lack of Krsna Consciousness."
There is definitely an urgent need for all to come into contact with Krsna. As long as we are in contact with the world of attachments, the further we are from the Supreme Personality of Godhead. Krsna being the Most Merciful has sent His beloved agents in the form of Gurus. It is the duty of every man to seek a higher truth to get out of their miseries. Therefore, the bona-fide gurus are the best reformers in society. One may build orphanages or hospitals but the real issue---the core of the problem, that is of the soul is not resolved.
The great acaryas are not for political or social reforms. Their method is simply giving pure harikatha.
Srila Bhaktivedanta Swami Maharaja sat under a tree in Thompson Square Park in New York. His pure chanting and harikatha turned hippies into happies. How is it possible? The power of Krsna-nama and Harikatha is so powerful that it can change the worst type of miscreant into a devotee of Krsna. Of this there is no doubt. It is the truth proclaimed by the sastras.
The more we hear and serve Harikatha and Krsna-nama, the more attached we become to the lotus feet of Vaishnavas, Guru and the Divine Couple, Sri RadhaKrsna.