How might a widespread decline in afterlife beliefs change society's priorities regarding justice or morality?

Why do some neighbors choose to go the extra mile to help others, like taking care of your lawn for free, even when they don’t have to?
Why do I constantly dream about my husband's ex trying to win back my husband? I always have that dream.
How do you handle those embarrassing moments when your partner catches you doing something silly at night?
How can a student recover and move forward if they’ve been asked to leave a PhD program? What paths are available?