From The Economist Style Guide (current edition) under the section entitled “Political Correctness”:
HE, SHE, THEY
You also have a duty to grammar. The struggle to be gender-neutral rests on a misconception about Gender, a grammatical convention to make words masculine, feminine or neuter. Since English is unusual in assigning few genders to nouns other than those relating to people (ships and countries are exceptions), feminists have come to argue that language should be gender-neutral.
And, so long as you are not insensitive in other ways, few women will be offended if you restrain yourself from putting or she after every he. (emphasis added)
He or she which hath no stomach to this fight,
Let him or her depart; his or her passport shall be made,
And crowns for convoy put into his or her purse:
We would not die in that person’s company
That fears his or her fellowship to die with us.