One of the few Shariah Compliant (& ethical) ETFs on the LSE. Would open your use base up significantly to the Muslim market. WahedInvest is an example of a successful investment firm offering solely Shariah compliant investments.
That would be a very subjective use of the term ethical. Sharia law is far from ethical to many people.
In the context of investing, it is mostly about avoiding banks, alcohol producers, gambling and weapon production stocks whilst concentrating on healthcare, technology and energy (which ISUS does). The contents of the ETF itself can thus be considered ethical I guess