Left can't replace family or religion. Its social solutions are alien, artificial. They fix nothing and damage everything. Their appeal is to those who are arrogant, starved for meaning, who want religion without religion and family without
For most of human history, men and women have derived their moral dimension of life from the family and religion. Both of those are now dead or dying in the West under the influence of its new moral and ethical system. That system is one that we know in its various forms as the left.