An issue that brought socialists together in the nineteenth century was Group of answer choices the desire to improve working and living conditions for most workers. a fear that Marxism would submerge the socialist alternatives. revisionism. nationalism.

the desire to improve working and living conditions for most workers.

Explanation:

The nineteenth century witnessed the emergence of the political party and unions. These parties and unions aimed towards working for the improvement and upliftment of the working class of the society. They adopted the ideologies of Marxism and socialism. The improvement in the working class of the society was their primary aim. Socialist parties also started to emerge that highlight the issue of growing capitalism in the world.  

new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.