Answer: Slavery was legal in most societies at some time in the past but is now outlawed in all recognized countries. The last country to officially abolish slavery was Mauritania in 1981. Nevertheless, there are an estimated 40.3 million people worldwide subject to some form of modern slavery.
Although even now people are still being enslaved without permission.
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Answer:
With taxes in the New England colonies
Multiple factors were involved in the decision of exploration of Mars.
Mars is similar to Earth in size and it is the next planet. Moreover, evidence was present to suggest that liquid water existed, and may possibly still exist, on Mars. All of these factors led to the planet's exploration.
You mean in practice or in theory? Because with any political party, the outcome is always different.
Shortage of money, gun powder, and food