Rig made the blanket assertion:

When churches organize people to go on missions in poor places in the world, they do indeed raise the standard of living for a lot of the folks they come into contact with. The price the indigenous population pays for that is to consent to be converted to the brand of religion that these missionaries represent.

I grant you that this has been fairly common, but it's far from universally true. The Quaker (Friends) and the Unitarian-Universalist efforts, just for instance, are not proselytizing, and I expect that there are a number of other missions that are similar.

Dave Oesterreich