on the same level;  equal;  equalitarian
To treat somebody on equal terms;  to treat somebody as an equal
To be on equal terms with somebody;  to be on an equal footing with somebody;  to be on the same footing as somebody
All peoples in the world are born equal, enjoy the right to freedom and happiness
Equality of opportunity/income
Parity/equality of status
To respect the sovereign equality of all nations
A classless and equalitarian society