Here are some reasons: They were curious. They were just natural born explorers. They wanted to spread their religion.
During the Age of Discovery (also known as the Age of Exploration), which took place from around the 15th Century until about the 18th Century, the following explorers took respective routes to observe the paired locations:
Christopher Columbus to the Americas
Corte Real to Newfoundland
Da Gama to India
Cabral to Brazil
Tasman to New Zealand
Magellan to Straits of Magellan
Janszoon to Australia
Balboa to the Pacific Ocean
James Cook to Hawaii and Antarctica
It led to the start of world war 1. Archduke Ferdinand was from the Balkans which was known as the "powder keg" of Europe during this time period.
The strongest supporters were the Antifederalists. Hope that helps out.
Truman's opposition to labor unions was one reason for the Democrats' defeat in the presidential election of 1952.