By far, the highest number of people are those falling out of religion. A lack of religion (Atheism) is not a religion, but I believe it qualifies as the answer.
Atheists do not have a position to agree or disagree with people converting to anything, it is the convertors own choice. However some atheists would disagree with converting to a religion because they believe religion to be untrue and thus that converting someone would be to feed him or her untruths.
i am converting to islam
Why were common people in Ghana less likely to convert to Islam you ask? Because they were born with a religion and they kept it alive. Kings thought that they could have more control by converting to a different religion.
Europeans colonized in pursuit of (1) more wealth, (2) more land, (3) more prestige vis-à-vis its neighbors, and (4) converting more people to the "proper" religion.
It really all depends on which religion you're converting from, and which you're converting to.
Yes if is, as converting to any religion is good, as I am a Muslim I would say it is good.
It helped those you were trading with see you as one of them. It created a connection and harmony. People naturally are more interested in dealing with people who share their beliefs than with people who don't.
People pass on their religion so it can live on and not die. For most people, the more people that join their religion the better.
Jewish
Christianity
The Babylonians practiced polytheism (belief in many gods) Later converting to Christianity from the 1st to 4th centuries AD.
Being a missionary is considered a religious job, since you go around converting people into your religion. You can also be the priest, pastor, or any of such jobs.