↗ https://reddit.com/r/investing/comments/1ptq2qk/investing_in_emerging_markets_or_allworld_etfs_is/
This is only true regarding emerging markets that classify as such due to lack of economic freedoms, such as China or South Korea.
If we take the - very reasonable - stance that economic freedom is a key pilar on which democracy is based upon, and that the lack of economic freedom always results in variations to slavery, investing in these markets is unethical.
This is specially true in a time when China and Russia are openly conducting an hybrid war against liberal societies.
I'd say it's wise to prefer WEBN and IWDA to VCWE or AWCI.