Sikhism began as a movement to combine

Sikhism emerged as an effort to harmonize Islamism and Hinduism. But observing Sikhism as a harmonization of the two faiths do not apprehend the doctrinal and aesthetic feature of the Sikh faith. To command Sikhism, an accommodation within Islamism and Hinduism would be considered as an outrage akin to summoning a Christian a skeptical Jew. Sikhism is not worship nor a combination but a distinguished theological evolution.

i am pretty sure it is a

after the aryan's settled in india they changed for the better i bellieve they changed from nomads having to keep moving to being farmers   they were aswell avaible to turn the ganges river into farmland.   which is great they added a big affect on farming as we know of it today.