One of the top six religions in the world!

What is the point of origin? How was it spread? Is it monotheistic or polythistic?

Hinduism originated in India. This religion was spread through relocation diffusion. This is a polytheistic religion.

Who founded it? Who are the major deities? What are the basic beliefs?

There is no recorded founder. Hinduism is a polytheistic religion so there are hundreds of deity's. Hindus believe that divine beings exist in unseen worlds and that temple worship, rituals, sacraments and personal devotionals create a communion with devas and Gods.

How is the leadership organized? what do the members call thier holy books?

Brahmins are the most powerful leaders in the Hindu religion. Some Hindu sacred texts are the Vedas, Upanishads, Bhagavad Gita, and Epics.

what sects have developed over time? Where is it most influential today?

Some sects that have developed over time are Shaivism and Vaishnavism. Hinduism is most influential in South East Asia and northern India.

How many followers are their world wide?

1,000,000,000 followers world wide!!!!!