According to British sociologist and biologist , Charles Darwin's theories of evolution meant that the fittest in society would demonstrate their superiority through economic success, while state welfare and private charity would encourage survival of the weak.

The theory by Charles Darwin about the survival of the strong and the elimination of the weak  is known as:

According to Charles Darwin, he believed that in any given ecology or habitat, there exists some animals or organisms which are stronger than others and are able to adapt better than others.

As a result of this, he opined that the strongest would always survive the perils of nature and thrive and their species would live on, while the weaker ones who cannot adapt, would be systematically wiped off

Therefore, the correct answer is Natural selection

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1. artillery

2. jose san martin

3.their economies remained dependent on outside powers.

4. drafted new economies

5. democracies have replaced dictatorships