^13:16And he causes all, the small and the great, and the rich and the poor, and the free men and the slaves, to be given a mark on their right hand, or on their forehead,

And he causes ALL,

There is no exclusion, and once the MARK is taken, that person's eternal destiny is determined (Revelation 14:9-11).

the small and the great, and

According to Hebrews 8:11, ALL shall know Me (Jesus), from the least to the greatest of them. This is Satan's counterfeit of that passage of Scripture.

the rich and the poor, and

This is both materially and spiritually (Luke 16:19-31).

the free men and the slaves,

This is unknown in Christ's world (Galatians 3:28), so this must be a worldly distinction.

to be given a MARK

• on their right hand, or {if they don't have a right hand}
• on their FOREHEAD, {which all living persons have.}

Much has been written about this MARK. There is speculation from ultraviolet tatoos to implantable ID chips to universal credit card, but that doesn't explain primitive peoples in the ALL part of this verse. Thus one should consider this as a symbolic commitment to worshiip the IMAGE (like a gang symbol) or a food voucher program (see next verse).

Moses indicated that it was a reminder of belonging to a special group, those who exited from Egypt, and was to be taught continually (Exodus 13:3-16).