My opinion:
I would say my neighbors share some of the same cultures, Christmas, Thanksgiving, Halloween (whatever you believe is a tradition). I certainly know we don’t share the same religion. Some believe in God and etc. some don’t. It’s better for everyone to share either the same or different culture. It is possible to share the same one.
Population growth has affected earth a lot based on the pollution we give out. We have also given chances for technology to advance because of population growth and the more and more people who try are the more people who advance with technology. Technically is helpful and allows many things to be simpler than they used to be back 50 years ago hope this kinda helped!