What place and time was the worst in human history

The black death… 1347-1353

And or

Holocaust 1941-1945

c.) biotic: snails; abiotic: temperature climate

one of the main reasons was definitely slavery. back in 1861, republican abraham lincoln was elected and ended up being a major influence in the slavery business. slavery greatly affected the texas economy because back in 1845 during the annexation of texas, slaves became a big part of the texas population. many texans that were in favor of the secession influenced groups through party ties.