The Hindu Trinity, the Hindu divine hierarchy, the Hindu festivals, and everything else that we see today were formulated by them. The religion got so excessively dependent on these sages that they started being considered as the representatives of the creator on earth.
Excessive mythicization finally led to the relegation of this institution from the purview of the real world into the realm of mythology, to the extent that they started being regarded as mythical personalities. This institution got destroyed at the time of the three hundred year severe drought of 2200 BC. At that time, most of the Indians, devastated by the drought, left India for foreign shores, especially to European lands.
The institution of seven sages got destroyed in the subsequent societal turbulence, as a result of which, the origins of Hinduism have once and for all become lost in the dungeons of time, becoming the source of intense mystery to this day.
The Institution of Saptarshis is the founder of Hinduism. The Seven Sages laid down the Origins of Hinduism.