Research are likely to suggest that competitive encounters are likely to be more hard working while the collaborative encounters are the ones who will likely give their time to cooperate. It is because competitive encounters are usually competitive in a way of reaching their tasks or goals while the collaborative encounters are likely to just cooperate because of their knowledge with the given task.
        
             
        
        
        
The presidents.
Hope this answers your question.
        
             
        
        
        
Airplanes brought several changes to our societies, lives and environment. Within the pros of this new mean of transport we can find the increase of the speed in which we travel and goods reach another shore. This affected positively the price of merchandises, which became easier to obtain around the world. What in the past was limited to be transported by land or across the sea, with the risk of never arriving, now it is very easy to obtain. Of course that they also opened a lot of new job opportunities for quite a few people. New careers were created and now a lot of people profit from this industry. Last but not least is the industry of tourism. Travelling has become much easier and practical since planes began to transport us. 
On the other hand, the impact on the environment was not as good as in the others. Planes consume, and realease in the atmosphere, fosil fuels. This is limiting our natural resources at an incredible speed, apart from the fact that it contributes negatively to the matter of pollution.
 
        
             
        
        
        
Plessy V. Ferguson was only a landmark decision in the Supreme Court of the United States issued in 1896. The impact of Plessy v. Ferguson allowed the statement "Separate but equal" also known as segregation to become law in U.S. After this event, Jim Crow laws which were a system of laws meant to discriminate against African Americans, spread across the United States.
        
                    
             
        
        
        
Social stratification<span> is a society's categorization of people into socioeconomic strata, based upon their occupation and income, wealth and </span>social status, or derived power.