What do some opponents of the decision to drop the atomic bomb point to as evidence that japan would have surrendered without the bombs being dropped?

The two main arguments that opponents of annexing foreign territories presented were 1) that it was too expensive and costly for the US to do so, and 2) that it was morally reprehensible since it usually led to the demise of local economies and civil rights. 

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.