What is the origin of the idiom "on an equal footing" and when to use it?

The idiom "on an equal footing" has its origins in the concept of balance and fairness. While it is difficult to pinpoint its exact origin, the expression likely evolved from the imagery of individuals standing on a surface that is level and even, providing equal support and stability. It is commonly employed in discussions, negotiations, or agreements to advocate for treating all parties or individuals involved in a particular situation with equal rights, opportunities, or considerations.