According to Vedic scriptures the present age is called Kali-yuga and almost all human beings are now degraded to the standard of the mode of ignorance and therefore the greater number of population are subjected to the pangs of the threefold miseries of material existence in the most horrible manner.
In such rabid condition of human being the panacea is "Krishna sankirtana" recommended in all scriptures. By this process, the forgetfulness of human being of his eternal relation with Godhead, is removed altogether.
Sri Caitanya Mahaprabhu as confirmed incarnation of Sri Krishna the Personality of Godhead inaugurated this sankirtana movement and He reclaimed all conditioned souls from all ranks of life even from animal kingdom for being re-instated in the transcendental relation and activities of loving service to the Absolute Truth. Thakura Haridasa who happened to appear in the family of a Mohammedan was one of His principle associates and His transcendental movement embraced all varieties of people beginning from the most erudite scholar brahmanas to the one who came in the family of yavana & candala.
The specialty of His movement was that the fallen candala did not remain a candala after his initiation but he was made to rise up to the status of Vaisnava which is far above the status of brahmana and other orders of life.
That is the process of social upliftment. And we follow the footprints of Sri Caitanya Mahaprabhu and His associates who were all kind enough to raise the social status of every one concerned irrespective of birth and occupation.
Such process is not only transcendental to all sorts of mundane speculation, but is very simple and innocent. The principle is a sort of curing a disease not only by administering proper medicine but also by supplying proper diet at the same time.
The medicine is administered through submissive aural channel as "Hari Sankirtana" which means
(1) To sing "Bhajan" songs glorifying the Almighty and His Pastimes.
(2) To preach the teachings of Bhagavad-gita, Bhagavata, Ramayana, life of such saints as Caitanya Mahaprabhu, Tulsidas etc.
(3) To establish the philosophy of devotional life as against fruitful action or dry speculation of empiric philosophy and meet the opposite elements with all logical weapons. i.e the medicine of "Hari Sankirtana" is administered by threefold action, namely by (a) melodious songs (b) by propaganda through press and (c) by propaganda on platforms.
The diet portion of the transcendental treatment consists in the distribution of prasadam. i.e. in all gatherings the audience should not only be sustained by melodious musical performances of Bhajan Sangat or by religious or theistic discourses but they must be given some sort of remnants of food-stuff offered to God, as recommended in Bhagavad-gita.
By this process of medical treatment people become gradually free from the following four kinds of addictions of sins namely—
(1) Illegitimate connection with women.
(2) Habit of animal killing.
(3) Addiction to intoxication habits
(4) Lure of gambling.
The conditioned human beings are enwrapped in the above four special ___ due to the influence of Kali-yuga and by the transcendental treatment of Hari Sankirtana the mirror of the heart of human being becomes cleansed of all the above mentioned dusts.