Human

For mechanics and traits see D&D Beyond
When Bastion was founded, Humans made up less than a quarter of the total population, but that has now grown to more than half of the some 300,000 inhabitants of Bastion. 
Humans are looked upon as the lowest caste within the city, and are given the basest positions, often working in service industries, manufacturing and used as foot soldiers within the military. The lack of significant choices or representation within the city has led to some unrest and upheaval, but the last time there was open dissent was nearly two decades ago but this was swiftly crushed by the sudden deployment of the new Warforged.
Many humans in the city find these constructs unsettling as not only will they reinforce the power of the dwarves, but may also take away what little jobs and use they have in the city over time. The method of manufacturing the golems is a closely guarded secret that no-one outside the Craghammer family knows, but many believe that some new magic must have been discovered to power these marvels.