The Bible says we reign in life. Jesus Christ has made us kings and priests unto our God and we shall reign upon the earth.
It doesn't mean some will rule over others. It means we mutually reign in life!
Your goal as a Christian should not be to rule over others. Our goal is that we all get to reign together, in life.
Mutual reigning comes about through mutual serving.
As an illustration, imagine a large multi-national corporation that is considering entering a foreign market in a developing country, or considering opening an operation in that country. The company has a reasonable expectation - to make a profit. And since the company's activities meets a perceived need, or provides a desired service or product - its presence in the developing country is more than tolerated - it is sought. So both are happy. Both feel they are profiting. Both have served the other. That's the principle of business. It is consistent with Gospel values.
In this way the living standard of a developing country can be elevated and doors of opportunity can open to share the Gospel because everyone perceives a profit all around.
This is reigning, not one over the other, but mutually, in life.
This is not colonization for monopolization alone - it is co-operation for mutualization of benefits - and God gets the glory through Jesus Christ.
"The blessing of the Lord, it maketh rich, and he addeth no sorrow with it".
We are to seek the well-being of each other, not of ourselves.
Everything we take to the nations is to be offered with love and in a spirit of serving - no matter whether it's the Gospel we are taking, or whether it's a service, or a product or an ideology.
Some of us are called to be separated unto the Gospel. Others are called to remain in business. Each of us has a different calling. But our heart must be to serve. And notice this remarkable promise Jesus made:
"And Jesus answered and said, Verily I say unto you, There is no man that hath left house, or brethren, or sisters, or father, or mother, or wife, or children, or lands, for my sake, and the gospel's,But he shall receive an hundredfold now in this time, houses, and brethren, and sisters, and mothers, and children, and lands, with persecutions; and in the world to come eternal life."
Notice that all who live godly in Christ Jesus shall suffer persecution. Therefore despite any gains or persecutions we may realize in this world, our steadfast hope remains in the coming of Christ, and the prize we seek is eternal life in the world to come.