I think that the best answer to this is foreign investment: it was the one aspect which has helped Bulgarian economy the most.
The foreign investment is mostly connected to tourism - especially for example when rich western Europeans buy property in Bulgaria for private use.
When workers form a union, they are exercising a basic civil right. ... The statutory right to form a union and engage in collective bargaining is necessary to ensure that workers can continue to exercise their civil right to associate with other workers on issues of mutual concern.
A Spanish treatment of the Native Americans was poor. Spanish explorers considered the natives inferior. Consequently, they forcibly converted natives to Christianity, confined them to slavery and murdered them.
Why? The Spanish, for the most part, treated the Native Americans poorly. The Spanish were interested in the riches of the Americas, and they had no problem in forcing the Native Americans into slavery so they could mine the gold and the silver for Spain
The promoter of the golden mean (golden ratio) is Dr. George Markowsky. He wrote a article about the "Misconception of the golden ratio.