There is a great effect of the arrival of the Polish, German and Venetian colonist have on the plot " Cornerstone of Civil rights" because these arrivals of the arrival of the Polish, German and Venetian colonist boost the struggle for civil rights. The Polish, German and Venetian colonist also helps in the struggle in gaining of civil rights so we can conclude that their arrivals have a good effect on the civil rights movement.
Sahara is a desert in Africa which is 9,200,000 square kilometers long. It is largest hot desert on earth. It is third largest desert in the world. The atmosphere of Sahara desert is very hot and people are not able to stay there for a longer period.