Here we have another totally unacceptable typo in the 1841 British edition, one that replaced people with the impossible power. One would think that the typesetter was falling asleep here since there is no nearby power that could have triggered this error. Nor does the error say much for the proofing, if there was any at this stage near the end of the printing of the 1841 edition. The following LDS edition (1849) restored the correct people.
Summary: Maintain the word people in Ether 15:6, the reading of the earliest textual sources.