Srimad Bhagavatam Canto 07, Chapter 02, Text 11

SB 7.2.11

visnur dvija-kriya-mulo
 yajño dharmamayah puman
 dharmasya ca parayanam
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
The basic principle of brahminical culture is to satisfy Lord Visnu, the personification of sacrificial and ritualistic ceremonies. Lord Visnu is the personified reservoir of all religious principles, and He is the shelter of all the demigods, the great pitas, and the people in general. When the brahmanas are killed, no one will exist to encourage the ksatriyas to perform yajñas, and thus the demigods, not being appeased by yajña, will automatically die.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
Since Visnu is the central point of brahminical culture, Hiranyakasipu’s plan was to kill Visnu, for if Visnu were killed, naturally the brahminical culture would also be lost. With brahminical culture lost, yajña would no longer be performed, and for want of yajña the regular distribution of rainfall would cease (yajñad bhavati parjanyah). Thus there would be disturbances all over the world, and naturally the demigods would be defeated. From this verse we get a clear indication of how human society is disturbed when the Vedic Aryan civilization is killed and the Vedic ritualistic ceremonies performed by the brahmanas are stopped. Kalau sudra-sambhavah: because the population of the modern world consists mostly of sudras, the brahminical culture is now lost and is extremely difficult to reestablish in a proper way. Therefore Lord Caitanya has recommended the chanting of the holy name of the Lord, which will revive brahminical culture very easily.
harer nama harer nama
 harer namaiva kevalam
kalau nasty eva nasty eva
 nasty eva gatir anyatha
Because of the increment in demoniac population, people have lost brahminical culture. Nor is there a ksatriya government. Instead, the government is a democracy in which any sudra can be voted into taking up the governmental reigns and capture the power to rule. Because of the poisonous effects of Kali-yuga, the sastra (Bhag. 12.2.13) says, dasyu-prayesu rajasu: the government will adopt the policies of dasyus, or plunderers. Thus there will be no instructions from the brahmanas, and even if there are brahminical instructions, there will be no ksatriya rulers who can follow them. Aside from Satya-yuga, even formerly, in the days when demons were flourishing, Hiranyakasipu planned to destroy the brahminical culture and the ksatriya government and thus create chaos all over the world. Although in Satya-yuga this plan was very difficult to execute, in Kali-yuga, which is full of sudras and demons, the brahminical culture is lost and can be revived only by the chanting of the maha-mantra. Therefore the Krsna consciousness movement, or the Hare Krsna movement, has been inaugurated to revive brahminical culture very easily so that people may become happy and peaceful in this life and prepare for elevation in the next. In this regard, Srila Madhvacarya quotes this verse from the Brahmanda Purana:
vipra-yajñadi-mulam tu
 harir ity asuram matam
harir eva hi sarvasya
 mulam samyan mato nrpa
“O King, the demons think that Hari, Lord Visnu, exists because of the brahmanas and yajña, but factually Hari is the cause of everything including the brahmanas and yajña.” Therefore, through the popularizing of hari-kirtana, or the sankirtana movement, the brahminical culture and ksatriya government will automatically come back, and people will be extremely happy.
Srimad Bhagavatam Canto 07, Chapter 02, Text 10
Srimad Bhagavatam Canto 07, Chapter 02, Text 12