How Many Christians in the World?

[Grace Seeker]

Is the figure around 2 point something billion?
So about a third of the world?

In round numbers, that's about right.

Of course, not all of those for whom that moniker is applied actually behave in accordance with the guidelines laid down in scriptures for Christians to adhere to. For instance, scriptures says: "Let us not give up meeting together, as some are in the habit of doing, but let us encourage one another—and all the more as you see the Day approaching" (Hebrews 10:25). But do all Christians attend to worship or assemble in their respective churches? No. Nor, if I understand Hebrews, have they ever. There are always those who claim to be a part of the group, but who do not live by the standards of that group. I'm sure you find the same is true in Islam, Budhism, Hinduism, Judaism and any other religious body you might name. And I assume that realization is what leads to your second question:

I'd like to ask, how many people do you think are actually Christians?

That's much harder to say, for you are asking me to look inside and judge men and women's hearts. Truly, only God can do that. We know that, according to Jesus, in the end ""not everyone who says to me, 'Lord, Lord,' will enter the kingdom of heaven, but only he who does the will of my Father who is in heaven" (Matthew 7:21). In reality, by that standard, since none of us always do the will of the Father, it may be that no one enters heaven. But we expect that there is an element of grace, but at what level? Again, I don't know. Nor do I think any but God who looks into each person's heart can answer that question.

Just from observable facts, it seems that in the USA only 1/4 to 1/3 of those who are members of churches actually attend those churches. But I'm not going to tell you that none of those who fail to attend are genuine Christians nor that all of those who do attend actually are. Fedos give his opinion that the actual number of people who take the name of Christ that really belong to Christ is extremely low. I'm not ready to go down in the single digits percent wise, but I would agree that based on behavior, at least in the western world, there are far more nominal (in name only) Christians than spirit-filled Christians to be found. In the emerging nations found in Africa, Asia, and to a lesser extent Latin America, I suspect that the opposite is true.

Because in Britain, I'd presume a lot of white people are Christians, yet most young women tend to where revealing clothes, drink a lot, have sex before marriage et all, and that which is just easily seen in British society.

And that would be what I would expect to see in a culture where nominal Christians will wear a cross, but don't bear the cross. (A reference to Jesus' comments on what it means to be a disciple: Matthew 10L38, Mark 8:34, Luke 9:23 and 14:27.)

Now I don't know how much of that above is not allowed in Christianity, but I know sex before marriage isn't, and I read somewhere that one shouldn't dress indecently. Then yet why is things like flirting and sex so acceptable?

Short answer: It isn't.

Just because people engage in something, doesn't mean that it is acceptable; just as those same things are engaged in but not acceptable in Islam. Preachers speak against these things all the time.