The Christian missionaries brought food, medical supplies, education and other things that people they visited didn't have. This gave them an aire of superiority, and lead natives to listen to them
Christianity is relevant because it is the religion of many people in the world. Since Christianity is a major religion, many people base their decision on Christian beliefs.
Christianity. However, many people are non practicing Christians, so Islam probably has more people actively participating in their religion than Christianity.
About 2 billion.
Lutheranism, Eastern Christianity, Catholicism, and many others.
The state religion in the UK is the Church of England, a variety of Christianity, but many people belong to other religions and many people do not regularly attend any form of worship, even if they nominally belong to a religion.
Israel is home to many people of every religion. Historically, both Judaism and Christianity began there.
Most people in the US who profess any religion profess to be Christians. There are many denominations of Christianity in the US.
Because many Romans liked the religion as well as some of the people with more power.
Many people show their religion by going to church regularly. But mainly Christianity is faith, and you shouldn't feel obliged to show your faith.
There are many, many different leaders in Christianity, because there are many different organized churches and groups within the Christian religion.
Origanially their native Roman beliefs (conquerored peoples, excluding the Jews, practiced it in conjuction with their own faith) but later the offical religion became Christianity. Follow this http://www.historyforkids.org/learn/romans/religion/
56% of people in France follow the religion of Christianity