Vastu shastra is an ancient Indian science pertaining to the design of dwellings, offices, and buildings to foster tranquility, happiness, and positive energy. This ancient Indian science aims at placing the proper rooms, furniture, and entrances that allow positive energy to flow freely in the space, balancing the five elements of nature-earth, water, fire, air, and space. When nature cooperates with the surrounding, life becomes sans easy and prosperous. An application of Vastu considerations could benefit the ambience, health, relationships, or economic stability around homes and offices.
It is not about changing the whole world. It is about a few small changes that can make great differences.