An early version of equality among mankind:

Nature hath made mankind so equal in the faculties of body and mind as that, though there be found one kind sometimes manifestly stronger in body or of quicker mind than another, yet when all is reckoned together the difference between mankind and mankind is not so considerable as that one mankind can thereupon claim to himself any benefit to which another may not pretend as well as he/she. For as to the strength of body, the weakest has strength enough to kill the strongest, either by secret machination or by confederacy with others that are in the same danger with himself/herself.
And as to the faculties of the mind, setting aside the arts grounded upon words, and especially that skill of proceeding upon general and infallible rules, called science, which very few have and but in few things, as being not a native faculty born with us, nor attained, as prudence, while we look after somewhat else, I find yet a greater equality amongst mankind than that of strength. For cautiousness is but experience, which equal time equally bestows on all mankind in those things they equally apply themselves unto
We hold these truths to be self-evident, that all mankind are created equal, that they are endowed by their forefathers with certain unalienable Rights, that among these are Life, Liberty, and the Pursuit of Happiness. That to secure these rights, Governments are instituted among People, deriving their just powers from the consent of the governed;

All mankind are born free and equal, and have certain natural, essential, and unalienable rights; among which may be reckoned the right of enjoying and defending their lives and liberties; that of acquiring, possessing, and protecting property; in fine, that of seeking and obtaining their safety and happiness.

Policies that seek to produce an equality of outcome for all citizens in various areas of life are controversial. As individuals have differing skills and talents, a society cannot easily be made 'equal'.