Why did abraham lincoln write the emancipation proclamation?

imperialism is a type of government that seeks to increase its size, either by forcing (through war) or influencing (through politics) other countries to submit to their rule. the sun never sets on the roman empire, or so went the saying when rome controlled the majority of europe 2000 years ago.

your answer is

to dominate europe

and i know for a fact it can't be the others