Both western europeans and latin american people could immigrate "freely" under that immigration act. The act was intended as a mean to limit the immigration of people whose ancestry was "non white", while increasing the number of "white" inmigrants to guarantee a more homogeneous population in the US. The first group of people was allowed to immigrate because many people living in the US came from the british islands, and in the case of latin american people, since they were a mixture of european and native american parents, they were considered as "white", too. People not allowed to immigrate under this act: asians and east europeans.
The correct answer to your problem is yes!
Answer:
*Civilization really hasn't changed over the years that much because us humans still break our backs to get to the goal that we would like to accomplish. But there has been maybe a few bit of some changes, we have technology now, we can do a bit more things that we couldn't have done back then in history.
*Civilization changed over time because we needed it to, Because we actually wanted it to. Through the years we worked hard as a slave just to feed our families, so basically civilization changed for such a good reason. Civilization changed for Us.
I believe the answer is "slave code"