It was quite cold in the late 1800s. What's caused the rise? A bit of everything. Solar high-energy activity, deforestation, lack of major volcanic activity, emissions. The question is by what degree?
I'm more concerned about the next ice age to be honest. Has anybody predicted when that will be yet?
https://skepticalscience.com/co2-lags-temperature.htm
http://www.longrangeweather.com/global_temperatures.htm Be very careful where you click! Their main graph has no vertical scale.
https://www.theatlantic.com/technology/archive/2013/03/were-screwed-11-000-years-worth-of-climate-data-prove-it/273870/ Of course there is a massive uptick on the right hand side. That's when the measurements are less smoothed.
https://www.newscientist.com/article/dn11647-climate-myths-its-been-far-warmer-in-the-past-whats-the-big-deal/