Weren't most religious texts written after a good 60-100 years ? That is like probably 200-300 years in today's time (?) (given how little were the means to rec

Weren't most religious texts written after a good 60-100 years ? That is like probably 200-300 years in today's time (?) (given how little were the means to record / reproduce) I would be curious to learn how Religions/Christianity gained its way into mainstream. Most of these religions started as fringe/niche. Between we are all curious about a religion's product-market fit ;)