In a historic shift, the Boy Scouts of America will let girls enroll in Cub Scouts starting next year and allow them to eventually earn the highest rank of Eagle Scout, the organization said on Wednesday.

The unanimous decision by the 100-year-old group's board of directors came after years of requests from families and girls, it said, though the announcement prompted a largely negative reaction on social media.

"We believe it is critical to evolve how our programs meet the needs of families interested in positive and lifelong experiences for their children," Boy Scouts Chief Executive Michael Surbaugh said in a statement.