I'd like to add something to think about.

Order and chaos
The left is often associated with chaos, while the right is associated with order. Neither chaos nor order are fundamentally good or wrong. Chaos thrown into a despicable system (order) can be just as good as bringing order into chaos. Chaos is usually a factor which is bombarding a system, which then tries to process it into order. One can manage order, which is the known, the structure, the constant, but chaos is not manageable as it is, which is the unknown, the danger, the change.

What drives the left and the right?
What I think drives people is essentially the nature of humanity.
The leftists think, the human nature is fundamentally corruptible: Power leads to corruption, possession leads to greed, greed leads to corruption, conflict leads to wars, territoriality leads to social divisions, authority leads to obedience. In order to improve anything, our very nature has to change. One step in order to change that is to cut the roots which bind us to our ancestors, to our country, to our nature, to our culture, to religion. Conveniently they also believe that all these things are merely "made up" constructs, which are nothing else than illusions and backwards habits. Take care of others, if you are helpful, others will be helpful too.