Karma is woo woo. Some people are born into a life of shit and then die - sometimes horribly, while others get to enjoy life and have the means to do so for decades, some even get to have a beautiful death.
Probably so, but the world and nature's constant ebb and flow toward a different sort of rebalance tend to even things out in the longrun.
Dynasties, animals and civilizations come and go. The top goes to the bottom, middles often just stay middles, but where extremes exist, things tend to change over time.
Society or nature karma. Believing everything is personal karma leaves one to become or remain a victim of circumstance or abuse and also is a bit delusional. We aren't ever completely in control of our lives.