What work ends with the phrase.workers of all countries unite?

The phrase "Workers of all countries, unite!" concludes "The Communist Manifesto," authored by Karl Marx and Friedrich Engels in 1848. This work serves as a political pamphlet advocating for the working class to rise against capitalist societies and emphasizes the importance of solidarity among workers worldwide. The phrase encapsulates the call for international cooperation among the proletariat in their struggle for rights and equality.