Who is jain god before the advent of jain Theerthankaras and jainism
In Jainism, there is no concept of a creator god or a supreme being who existed before the Tirthankaras or before Jainism itself. Jain philosophy teaches that the universe is eternal and uncreated, with no beginning or end, and operates according to its own natural laws.
The Tirthankaras are revered as enlightened teachers who rediscover and preach the eternal truths (Jain dharma) in each time cycle. According to Jain cosmology, there have always been Tirthankaras in every time cycle—there is no period without the presence of Jain teachings in some form.
Jains worship the Tirthankaras as perfected souls (Siddhas), not as creator gods. The concept of god in Jainism refers to liberated souls who have achieved moksha (liberation) and are free from the cycle of birth and death, but they do not intervene in worldly affairs or create the universe.
Therefore, according to Jainism, there was no god before the Tirthankaras, as Jainism does not recognize the existence of a creator god at any time. The eternal truths taught by the Tirthankaras are believed to have always existed, even before their advent in each time cycle.