Slavery is an economic problem, so yeah, the numbers (in real terms) add up fine at this point in our progress.
Discussion
I agree. Voyages and colonies are just a by product of economics. Coincidence that they were all westerners.
People explore and travel (and compete) because of curiosity, need, and fulfilment. Christ came long after all of that had been established. The "west" is only a few hundred years old anyway, so, dumb name.