Compare the missionaries from Things Fall Apart to the mining company in Radiance of Tomorrow. Did one of them have more of a negative impact than the other?

Compare the missionaries from Things Fall Apart to the mining company in Radiance of Tomorrow. Did one of them have more of a negative impact than the other? What positives could be taken from them? How could both of these entities have resulted in more positive change? Refer to both books and at least one outside source.