via: http://mobilecodgers.blogspot.com/2015/07/moments-with-missionary-dealing-with.html

I favor sending: 

SCIENCE missionaries-- to debunk superstition and arouse wonder in the natives.

ENGINEERING missionaries--- to inspire  a can-do spirit in the natives.

AGNOSTIC missionaries to acquaint the natives with the ultimate mystery of life---to demonstrate to them tolerance for ambiguity. (the joyous philosophy of i don't know ism)

HISTORY missionaries to unfold the story of how we got to here.