What are the most challenging sources of conflict and crisis in the 21st
century?

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration

answer: a tolerated diverse population

explanation: the city of baghdad formed to vast semi- circles on the right and left banks of the tigris twelve miles in a diameter.

hamas is the terrorist group present in palestine.terrorism has been a feature of life in israel even before the country's establishment in 1948.as per israeli government, 3200 people have died in terrorist attacks.

in january 2007, meshal stated that hamas would consider recognizing israel once a palestinian state was established. a haaretz story noted, "this is the first time that a hamas official has raised the possibility of full and official recognition of israel in the future." according to the story, prime minister ehud olmert "shrugged off" meshal's statement.

in december 2010, hamas announced it would honor any palestinian referendum that approved a peace plan with israel. "we accept a palestinian state on the borders of 1967, with jerusalem as its capital, the release of palestinian prisoners, and the resolution of the issue of refugees," said haniyeh. "hamas will respect the results [of a referendum]," he added, "regardless of whether it differs with its ideology and principles." zvi bar'el, a leading haaretz political analyst, noted: "not a return of refugees, not the destruction of the state of israel, no preconditions.