Centuries ago,there were no industries in India. But still india was the richest country in the world which attracted the attention of the invaders. The reason the all this was India's focus on cow protection and agriculture. As India's focus shifted from cow protection and agriculture to industry , India was reduced to severe poverty. Industries benefitted a few, helped a few to become millionaires, but condition of masses considerably deteriorated. People left clean and healthy village life and migrated to cities to live in slums and work is hellish factories.
In Sanskrit literatures Cow is referred to as 'Kamadhenu' bestowed of all desires on human beings. India every drop of milk is put to good use. Every inch of mother cow is meant for the benefit of humanity, whether living or dead. in Indian villages, house flooring and walls are smeared with cow dung and cow dung patties are used as Fuel when cows graze in fields, they fertilize the soil by their urine and dung. On an average, a cow given birth to ten calves in her life time one other benefit for the keeper. Cow is economically useful not only alive but also when she is dead. The cobbler class eat her flesh and use hide for shoe making bones, hooves and horns are turned into fertilizer. It has been found that if an average cows contribution in her life time is quantified in money, it comes to millions of rupees. Thus cow represents sound economy.

The ancient Indian agricultural policy

A very high quality of seeds capable of growing quality & nutritious crops
Uses of very cheap agricultural implements manufactured at the village level.
Uses of bullocks as source of power irrigation, transportation can be easily.
Use of farmyard manure improves soil health.
Use of cattle urine as pesticide.
Collective labor on farms & distribution of the farm produce as wages
The traditional methods of preserving the food –grains by use of ashes of dung .
It was considered as a 'Yagna' or a service to the mankind.