Drought. Hope that helps.
The Philippines belongs to a number of international organizations, including the United Nations; the Association of Southeast Asian Nations (ASEAN) Regional Forum; Asia-Pacific Economic Cooperation forum; the International Monetary Fund; the World Bank; and the World Trade Organization among others.
A typical passage through the panama canal would take 8-10 hours
Answer:
Agriculture allowed people to stay in one place, and increased food production caused the population density to expand far beyond levels that could be sustained by hunting and gathering alone. This growth in population density provided a critical mass of people to sustain and spread contagious infectious diseases.
